2154402931 has 2 divisors, whose sum is σ = 2154402932. Its totient is φ = 2154402930.

The previous prime is 2154402881. The next prime is 2154402973. The reversal of 2154402931 is 1392044512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154402931 is a prime.

It is a super-2 number, since 2×2154402931² = 9282903978202781522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2154402893 and 2154402902.

It is not a weakly prime, because it can be changed into another prime (2154408931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077201465 + 1077201466.

It is an arithmetic number, because the mean of its divisors is an integer number (1077201466).

Almost surely, 2^2154402931 is an apocalyptic number.

2154402931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154402931 is an equidigital number, since it uses as much as digits as its factorization.

2154402931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2154402931 is about 46415.5462210669. The cubic root of 2154402931 is about 1291.5433186372.

The spelling of 2154402931 in words is "two billion, one hundred fifty-four million, four hundred two thousand, nine hundred thirty-one".