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243121234553 = 544344666771
BaseRepresentation
bin1110001001101100100…
…1111010001001111001
3212020112112111100212122
43202123021322021321
512440403014001203
6303404403451025
723364525253001
oct3423311721171
9766475440778
10243121234553
119411a664a2a
123b150986a75
1319c06c22a92
14baa5013001
1564cde9b538
hex389b27a279

243121234553 has 4 divisors (see below), whose sum is σ = 243165906768. Its totient is φ = 243076562340.

The previous prime is 243121234541. The next prime is 243121234589. The reversal of 243121234553 is 355432121342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243121234553 - 24 = 243121234537 is a prime.

It is a super-2 number, since 2×2431212345532 (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121224553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22327943 + ... + 22338828.

It is an arithmetic number, because the mean of its divisors is an integer number (60791476692).

Almost surely, 2243121234553 is an apocalyptic number.

It is an amenable number.

243121234553 is a deficient number, since it is larger than the sum of its proper divisors (44672215).

243121234553 is an equidigital number, since it uses as much as digits as its factorization.

243121234553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44672214.

The product of its digits is 86400, while the sum is 35.

Adding to 243121234553 its reverse (355432121342), we get a palindrome (598553355895).

The spelling of 243121234553 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirty-four thousand, five hundred fifty-three".

Divisors: 1 5443 44666771 243121234553