23542156531 has 4 divisors (see below), whose sum is σ = 23549102464. Its totient is φ = 23535210600.

The previous prime is 23542156513. The next prime is 23542156567. The reversal of 23542156531 is 13565124532.

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 23542156531 - 2¹³ = 23542148339 is a prime.

It is a super-2 number, since 2×23542156531² (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 (23542156571) 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, 3467880 + ... + 3474661.

It is an arithmetic number, because the mean of its divisors is an integer number (5887275616).

Almost surely, 2^23542156531 is an apocalyptic number.

23542156531 is a deficient number, since it is larger than the sum of its proper divisors (6945933).

23542156531 is an equidigital number, since it uses as much as digits as its factorization.

23542156531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6945932.

The product of its digits is 108000, while the sum is 37.

The spelling of 23542156531 in words is "twenty-three billion, five hundred forty-two million, one hundred fifty-six thousand, five hundred thirty-one".