42621164531 has 16 divisors (see below), whose sum is σ = 47138433408. Its totient is φ = 38214633600.

The previous prime is 42621164497. The next prime is 42621164563. The reversal of 42621164531 is 13546112624.

It is not a de Polignac number, because 42621164531 - 2²⁶ = 42554055667 is a prime.

It is a super-2 number, since 2×42621164531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42621164491 and 42621164500.

It is not an unprimeable number, because it can be changed into a prime (42621164731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144155 + ... + 325611.

It is an arithmetic number, because the mean of its divisors is an integer number (2946152088).

Almost surely, 2^42621164531 is an apocalyptic number.

42621164531 is a deficient number, since it is larger than the sum of its proper divisors (4517268877).

42621164531 is a wasteful number, since it uses less digits than its factorization.

42621164531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181762.

The product of its digits is 34560, while the sum is 35.

The spelling of 42621164531 in words is "forty-two billion, six hundred twenty-one million, one hundred sixty-four thousand, five hundred thirty-one".