2154870531 has 12 divisors (see below), whose sum is σ = 3395553720. Its totient is φ = 1305982080.

The previous prime is 2154870521. The next prime is 2154870559. The reversal of 2154870531 is 1350784512.

2154870531 is a `hidden beast` number, since 2 + 1 + 54 + 8 + 70 + 531 = 666.

It is not a de Polignac number, because 2154870531 - 2⁶ = 2154870467 is a prime.

It is a super-2 number, since 2×2154870531² = 9286934010744443922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2154870521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10883086 + ... + 10883283.

It is an arithmetic number, because the mean of its divisors is an integer number (282962810).

Almost surely, 2^2154870531 is an apocalyptic number.

2154870531 is a deficient number, since it is larger than the sum of its proper divisors (1240683189).

2154870531 is a wasteful number, since it uses less digits than its factorization.

2154870531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21766386 (or 21766383 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 2154870531 is about 46420.5830532104. The cubic root of 2154870531 is about 1291.6367524079.

The spelling of 2154870531 in words is "two billion, one hundred fifty-four million, eight hundred seventy thousand, five hundred thirty-one".