123452051531 has 4 divisors (see below), whose sum is σ = 123453314712. Its totient is φ = 123450788352.

The previous prime is 123452051507. The next prime is 123452051603. The reversal of 123452051531 is 135150254321.

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

It is a cyclic number.

It is not a de Polignac number, because 123452051531 - 2³⁰ = 122378309707 is a prime.

It is a super-2 number, since 2×123452051531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123452051131) 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, 471461 + ... + 684966.

It is an arithmetic number, because the mean of its divisors is an integer number (30863328678).

Almost surely, 2^123452051531 is an apocalyptic number.

123452051531 is a deficient number, since it is larger than the sum of its proper divisors (1263181).

123452051531 is a wasteful number, since it uses less digits than its factorization.

123452051531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263180.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 123452051531 in words is "one hundred twenty-three billion, four hundred fifty-two million, fifty-one thousand, five hundred thirty-one".