31491430162 has 16 divisors (see below), whose sum is σ = 47508499584. Its totient is φ = 15655302000.

The previous prime is 31491430141. The next prime is 31491430169. The reversal of 31491430162 is 26103419413.

It is not an unprimeable number, because it can be changed into a prime (31491430169) 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, 2778487 + ... + 2789797.

It is an arithmetic number, because the mean of its divisors is an integer number (2969281224).

Almost surely, 2^31491430162 is an apocalyptic number.

31491430162 is a deficient number, since it is larger than the sum of its proper divisors (16017069422).

31491430162 is a wasteful number, since it uses less digits than its factorization.

31491430162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19185.

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 31491430162 its reverse (26103419413), we get a palindrome (57594849575).

The spelling of 31491430162 in words is "thirty-one billion, four hundred ninety-one million, four hundred thirty thousand, one hundred sixty-two".