55231339 has 2 divisors, whose sum is σ = 55231340. Its totient is φ = 55231338.

The previous prime is 55231333. The next prime is 55231361. The reversal of 55231339 is 93313255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55231339 - 2³ = 55231331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55231339.

It is not a weakly prime, because it can be changed into another prime (55231331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27615669 + 27615670.

It is an arithmetic number, because the mean of its divisors is an integer number (27615670).

Almost surely, 2^55231339 is an apocalyptic number.

55231339 is a deficient number, since it is larger than the sum of its proper divisors (1).

55231339 is an equidigital number, since it uses as much as digits as its factorization.

55231339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150, while the sum is 31.

The square root of 55231339 is about 7431.7789929464. The cubic root of 55231339 is about 380.8276949285.

The spelling of 55231339 in words is "fifty-five million, two hundred thirty-one thousand, three hundred thirty-nine".