31256090 has 16 divisors (see below), whose sum is σ = 56368872. Its totient is φ = 12478464.

The previous prime is 31256087. The next prime is 31256101. The reversal of 31256090 is 9065213.

It can be written as a sum of positive squares in 4 ways, for example, as 27363361 + 3892729 = 5231^2 + 1973^2 .

It is a Curzon number.

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, 3062 + ... + 8478.

Almost surely, 2^31256090 is an apocalyptic number.

31256090 is a deficient number, since it is larger than the sum of its proper divisors (25112782).

31256090 is a wasteful number, since it uses less digits than its factorization.

31256090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 31256090 is about 5590.7146233733. The cubic root of 31256090 is about 315.0007222626. Note that the first 3 decimals are identical.

The spelling of 31256090 in words is "thirty-one million, two hundred fifty-six thousand, ninety".