55331657 has 2 divisors, whose sum is σ = 55331658. Its totient is φ = 55331656.

The previous prime is 55331611. The next prime is 55331663. The reversal of 55331657 is 75613355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54523456 + 808201 = 7384^2 + 899^2 .

It is a cyclic number.

It is not a de Polignac number, because 55331657 - 2¹⁰ = 55330633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55331057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27665828 + 27665829.

It is an arithmetic number, because the mean of its divisors is an integer number (27665829).

Almost surely, 2^55331657 is an apocalyptic number.

It is an amenable number.

55331657 is a deficient number, since it is larger than the sum of its proper divisors (1).

55331657 is an equidigital number, since it uses as much as digits as its factorization.

55331657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47250, while the sum is 35.

The square root of 55331657 is about 7438.5251898478. The cubic root of 55331657 is about 381.0581242856.

The spelling of 55331657 in words is "fifty-five million, three hundred thirty-one thousand, six hundred fifty-seven".