2151169531 has 24 divisors (see below), whose sum is σ = 2638748880. Its totient is φ = 1743723072.

The previous prime is 2151169519. The next prime is 2151169541. The reversal of 2151169531 is 1359611512.

2151169531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2151169531 - 2⁵ = 2151169499 is a prime.

It is a super-2 number, since 2×2151169531² = 9255060702205519922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2151169541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 628581 + ... + 631993.

It is an arithmetic number, because the mean of its divisors is an integer number (109947870).

Almost surely, 2^2151169531 is an apocalyptic number.

2151169531 is a deficient number, since it is larger than the sum of its proper divisors (487579349).

2151169531 is a wasteful number, since it uses less digits than its factorization.

2151169531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123 (or 4116 counting only the distinct ones).

The product of its digits is 8100, while the sum is 34.

The square root of 2151169531 is about 46380.7021400065. The cubic root of 2151169531 is about 1290.8968646478.

The spelling of 2151169531 in words is "two billion, one hundred fifty-one million, one hundred sixty-nine thousand, five hundred thirty-one".