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243131442122 = 2121565721061
BaseRepresentation
bin1110001001101111000…
…0110110001111001010
3212020120020200222000202
43202123300312033022
512440413122121442
6303405410332202
723365011105452
oct3423360661712
9766506628022
10243131442122
11941253a7038
123b15428a062
1319c09087c6a
14baa650cd62
1564ced15c32
hex389bc363ca

243131442122 has 4 divisors (see below), whose sum is σ = 364697163186. Its totient is φ = 121565721060.

The previous prime is 243131442121. The next prime is 243131442131. The reversal of 243131442122 is 221244131342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161426364841 + 81705077281 = 401779^2 + 285841^2 .

It is a super-2 number, since 2×2431314421222 (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243131442121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60782860529 + ... + 60782860532.

Almost surely, 2243131442122 is an apocalyptic number.

243131442122 is a deficient number, since it is larger than the sum of its proper divisors (121565721064).

243131442122 is a wasteful number, since it uses less digits than its factorization.

243131442122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121565721063.

The product of its digits is 9216, while the sum is 29.

Adding to 243131442122 its reverse (221244131342), we get a palindrome (464375573464).

The spelling of 243131442122 in words is "two hundred forty-three billion, one hundred thirty-one million, four hundred forty-two thousand, one hundred twenty-two".

Divisors: 1 2 121565721061 243131442122