55156531 has 2 divisors, whose sum is σ = 55156532. Its totient is φ = 55156530.

The previous prime is 55156501. The next prime is 55156561. The reversal of 55156531 is 13565155.

It is a balanced prime because it is at equal distance from previous prime (55156501) and next prime (55156561).

It is a cyclic number.

It is not a de Polignac number, because 55156531 - 2⁵ = 55156499 is a prime.

It is a super-2 number, since 2×55156531² = 6084485823907922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55156493 and 55156502.

It is not a weakly prime, because it can be changed into another prime (55156501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27578265 + 27578266.

It is an arithmetic number, because the mean of its divisors is an integer number (27578266).

Almost surely, 2^55156531 is an apocalyptic number.

55156531 is a deficient number, since it is larger than the sum of its proper divisors (1).

55156531 is an equidigital number, since it uses as much as digits as its factorization.

55156531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11250, while the sum is 31.

The square root of 55156531 is about 7426.7443068952. The cubic root of 55156531 is about 380.6556800864.

The spelling of 55156531 in words is "fifty-five million, one hundred fifty-six thousand, five hundred thirty-one".