42102636531 has 16 divisors (see below), whose sum is σ = 57100273920. Its totient is φ = 27586911200.

The previous prime is 42102636481. The next prime is 42102636533. The reversal of 42102636531 is 13563620124.

It is a cyclic number.

It is not a de Polignac number, because 42102636531 - 2⁷ = 42102636403 is a prime.

It is a super-2 number, since 2×42102636531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42102636492 and 42102636501.

It is not an unprimeable number, because it can be changed into a prime (42102636533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924901 + ... + 969353.

It is an arithmetic number, because the mean of its divisors is an integer number (3568767120).

Almost surely, 2^42102636531 is an apocalyptic number.

42102636531 is a deficient number, since it is larger than the sum of its proper divisors (14997637389).

42102636531 is a wasteful number, since it uses less digits than its factorization.

42102636531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49866.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 42102636531 in words is "forty-two billion, one hundred two million, six hundred thirty-six thousand, five hundred thirty-one".