55331357 has 2 divisors, whose sum is σ = 55331358. Its totient is φ = 55331356.

The previous prime is 55331351. The next prime is 55331359. The reversal of 55331357 is 75313355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53158681 + 2172676 = 7291^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 55331357 - 2⁶ = 55331293 is a prime.

It is a super-2 number, since 2×55331357² = 6123118134922898, which contains 22 as substring.

Together with 55331359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55331351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27665678 + 27665679.

It is an arithmetic number, because the mean of its divisors is an integer number (27665679).

Almost surely, 2^55331357 is an apocalyptic number.

It is an amenable number.

55331357 is a deficient number, since it is larger than the sum of its proper divisors (1).

55331357 is an equidigital number, since it uses as much as digits as its factorization.

55331357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23625, while the sum is 32.

The square root of 55331357 is about 7438.5050245328. The cubic root of 55331357 is about 381.0574356042.

The spelling of 55331357 in words is "fifty-five million, three hundred thirty-one thousand, three hundred fifty-seven".