2156614531 has 2 divisors, whose sum is σ = 2156614532. Its totient is φ = 2156614530.

The previous prime is 2156614529. The next prime is 2156614567. The reversal of 2156614531 is 1354166512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156614531 - 2¹ = 2156614529 is a prime.

It is a super-2 number, since 2×2156614531² = 9301972470640699922, which contains 22 as substring.

Together with 2156614529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2156614501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078307265 + 1078307266.

It is an arithmetic number, because the mean of its divisors is an integer number (1078307266).

Almost surely, 2^2156614531 is an apocalyptic number.

2156614531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156614531 is an equidigital number, since it uses as much as digits as its factorization.

2156614531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 2156614531 is about 46439.3640244997. The cubic root of 2156614531 is about 1291.9851116302.

The spelling of 2156614531 in words is "two billion, one hundred fifty-six million, six hundred fourteen thousand, five hundred thirty-one".