31491334090 has 32 divisors (see below), whose sum is σ = 57076502400. Its totient is φ = 12509640000.

The previous prime is 31491334073. The next prime is 31491334111. The reversal of 31491334090 is 9043319413.

It is a super-2 number, since 2×31491334090² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1061965 + ... + 1091215.

It is an arithmetic number, because the mean of its divisors is an integer number (1783640700).

Almost surely, 2^31491334090 is an apocalyptic number.

31491334090 is a deficient number, since it is larger than the sum of its proper divisors (25585168310).

31491334090 is a wasteful number, since it uses less digits than its factorization.

31491334090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29998.

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 31491334090 in words is "thirty-one billion, four hundred ninety-one million, three hundred thirty-four thousand, ninety".