31289161145 has 16 divisors (see below), whose sum is σ = 43116166080. Its totient is φ = 21558081600.

The previous prime is 31289161133. The next prime is 31289161159. The reversal of 31289161145 is 54116198213.

It is a happy number.

It is not a de Polignac number, because 31289161145 - 2¹⁸ = 31288899001 is a prime.

It is a super-2 number, since 2×31289161145² (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, 14969846 + ... + 14971935.

It is an arithmetic number, because the mean of its divisors is an integer number (2694760380).

Almost surely, 2^31289161145 is an apocalyptic number.

It is an amenable number.

31289161145 is a deficient number, since it is larger than the sum of its proper divisors (11827004935).

31289161145 is a wasteful number, since it uses less digits than its factorization.

31289161145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29941816.

The product of its digits is 51840, while the sum is 41.

The spelling of 31289161145 in words is "thirty-one billion, two hundred eighty-nine million, one hundred sixty-one thousand, one hundred forty-five".