31151120145 has 16 divisors (see below), whose sum is σ = 49847763840. Its totient is φ = 16611940224.

The previous prime is 31151120101. The next prime is 31151120171. The reversal of 31151120145 is 54102115113.

It is not a de Polignac number, because 31151120145 - 2¹⁰ = 31151119121 is a prime.

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, 9621 + ... + 249789.

It is an arithmetic number, because the mean of its divisors is an integer number (3115485240).

Almost surely, 2^31151120145 is an apocalyptic number.

It is an amenable number.

31151120145 is a deficient number, since it is larger than the sum of its proper divisors (18696643695).

31151120145 is a wasteful number, since it uses less digits than its factorization.

31151120145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248824.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 31151120145 its reverse (54102115113), we get a palindrome (85253235258).

The spelling of 31151120145 in words is "thirty-one billion, one hundred fifty-one million, one hundred twenty thousand, one hundred forty-five".