31434390538 has 16 divisors (see below), whose sum is σ = 48677126400. Its totient is φ = 15208776000.

The previous prime is 31434390523. The next prime is 31434390539. The reversal of 31434390538 is 83509343413.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31434390494 and 31434390503.

It is not an unprimeable number, because it can be changed into a prime (31434390539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017138 + ... + 1047586.

It is an arithmetic number, because the mean of its divisors is an integer number (3042320400).

Almost surely, 2^31434390538 is an apocalyptic number.

31434390538 is a deficient number, since it is larger than the sum of its proper divisors (17242735862).

31434390538 is a wasteful number, since it uses less digits than its factorization.

31434390538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47133.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 31434390538 in words is "thirty-one billion, four hundred thirty-four million, three hundred ninety thousand, five hundred thirty-eight".