55312357 has 4 divisors (see below), whose sum is σ = 55678816. Its totient is φ = 54945900.

The previous prime is 55312351. The next prime is 55312393. The reversal of 55312357 is 75321355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75321355 = 5 ⋅15064271.

It is a cyclic number.

It is not a de Polignac number, because 55312357 - 2³ = 55312349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55312351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183003 + ... + 183304.

It is an arithmetic number, because the mean of its divisors is an integer number (13919704).

Almost surely, 2^55312357 is an apocalyptic number.

It is an amenable number.

55312357 is a deficient number, since it is larger than the sum of its proper divisors (366459).

55312357 is a wasteful number, since it uses less digits than its factorization.

55312357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366458.

The product of its digits is 15750, while the sum is 31.

The square root of 55312357 is about 7437.2277765307. The cubic root of 55312357 is about 381.0138140453.

The spelling of 55312357 in words is "fifty-five million, three hundred twelve thousand, three hundred fifty-seven".