42031655131 has 4 divisors (see below), whose sum is σ = 42087179872. Its totient is φ = 41976130392.

The previous prime is 42031655069. The next prime is 42031655167. The reversal of 42031655131 is 13155613024.

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 42031655131 - 2²¹ = 42029557979 is a prime.

It is a super-2 number, since 2×42031655131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42031655093 and 42031655102.

It is not an unprimeable number, because it can be changed into a prime (42031655191) 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, 27761235 + ... + 27762748.

It is an arithmetic number, because the mean of its divisors is an integer number (10521794968).

Almost surely, 2^42031655131 is an apocalyptic number.

42031655131 is a deficient number, since it is larger than the sum of its proper divisors (55524741).

42031655131 is an equidigital number, since it uses as much as digits as its factorization.

42031655131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55524740.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 42031655131 in words is "forty-two billion, thirty-one million, six hundred fifty-five thousand, one hundred thirty-one".