31249209490 has 16 divisors (see below), whose sum is σ = 56428290648. Its totient is φ = 12459747456.

The previous prime is 31249209487. The next prime is 31249209533. The reversal of 31249209490 is 9490294213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13057404361 + 18191805129 = 114269^2 + 134877^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4988757 + ... + 4995016.

Almost surely, 2^31249209490 is an apocalyptic number.

31249209490 is a deficient number, since it is larger than the sum of its proper divisors (25179081158).

31249209490 is a wasteful number, since it uses less digits than its factorization.

31249209490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9984093.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 31249209490 in words is "thirty-one billion, two hundred forty-nine million, two hundred nine thousand, four hundred ninety".