2156514231 has 8 divisors (see below), whose sum is σ = 3026686720. Its totient is φ = 1362008952.

The previous prime is 2156514181. The next prime is 2156514323. The reversal of 2156514231 is 1324156512.

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

It is not a de Polignac number, because 2156514231 - 2²¹ = 2154417079 is a prime.

It is a super-2 number, since 2×2156514231² = 9301107257011042722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156514331) 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, 18916735 + ... + 18916848.

It is an arithmetic number, because the mean of its divisors is an integer number (378335840).

Almost surely, 2^2156514231 is an apocalyptic number.

2156514231 is a deficient number, since it is larger than the sum of its proper divisors (870172489).

2156514231 is a wasteful number, since it uses less digits than its factorization.

2156514231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37833605.

The product of its digits is 7200, while the sum is 30.

The square root of 2156514231 is about 46438.2841091270. The cubic root of 2156514231 is about 1291.9650820709.

The spelling of 2156514231 in words is "two billion, one hundred fifty-six million, five hundred fourteen thousand, two hundred thirty-one".