2155567531 has 8 divisors (see below), whose sum is σ = 2323500480. Its totient is φ = 1987937472.

The previous prime is 2155567523. The next prime is 2155567543. The reversal of 2155567531 is 1357655512.

2155567531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2155567531 - 2³ = 2155567523 is a prime.

It is a super-2 number, since 2×2155567531² = 9292942761402871922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155567231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60826 + ... + 89503.

It is an arithmetic number, because the mean of its divisors is an integer number (290437560).

Almost surely, 2^2155567531 is an apocalyptic number.

2155567531 is a deficient number, since it is larger than the sum of its proper divisors (167932949).

2155567531 is a wasteful number, since it uses less digits than its factorization.

2155567531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151445.

The product of its digits is 157500, while the sum is 40.

The square root of 2155567531 is about 46428.0898917886. The cubic root of 2155567531 is about 1291.7759987889.

The spelling of 2155567531 in words is "two billion, one hundred fifty-five million, five hundred sixty-seven thousand, five hundred thirty-one".