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57811232153 = 194929661997
BaseRepresentation
bin110101110101110100…
…010110010110011001
312112012222000212201102
4311311310112112121
51421344133412103
642320315201145
74114421236223
oct656564262631
9175188025642
1057811232153
1122576a2a414
12b254a461b5
1355b415c19c
142b25cdb413
151785503e88
hexd75d16599

57811232153 has 4 divisors (see below), whose sum is σ = 57840896100. Its totient is φ = 57781568208.

The previous prime is 57811232117. The next prime is 57811232161. The reversal of 57811232153 is 35123211875.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22792846729 + 35018385424 = 150973^2 + 187132^2 .

It is a cyclic number.

It is not a de Polignac number, because 57811232153 - 214 = 57811215769 is a prime.

It is a super-2 number, since 2×578112321532 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57811232183) 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, 14829050 + ... + 14832947.

It is an arithmetic number, because the mean of its divisors is an integer number (14460224025).

Almost surely, 257811232153 is an apocalyptic number.

It is an amenable number.

57811232153 is a deficient number, since it is larger than the sum of its proper divisors (29663947).

57811232153 is a wasteful number, since it uses less digits than its factorization.

57811232153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29663946.

The product of its digits is 50400, while the sum is 38.

The spelling of 57811232153 in words is "fifty-seven billion, eight hundred eleven million, two hundred thirty-two thousand, one hundred fifty-three".

Divisors: 1 1949 29661997 57811232153