55309951 has 2 divisors, whose sum is σ = 55309952. Its totient is φ = 55309950.

The previous prime is 55309937. The next prime is 55309957. The reversal of 55309951 is 15990355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55309951 - 2⁹ = 55309439 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55309951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55309957) 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 as a sum of consecutive naturals, namely, 27654975 + 27654976.

It is an arithmetic number, because the mean of its divisors is an integer number (27654976).

Almost surely, 2^55309951 is an apocalyptic number.

55309951 is a deficient number, since it is larger than the sum of its proper divisors (1).

55309951 is an equidigital number, since it uses as much as digits as its factorization.

55309951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30375, while the sum is 37.

The square root of 55309951 is about 7437.0660209521. The cubic root of 55309951 is about 381.0082894659.

The spelling of 55309951 in words is "fifty-five million, three hundred nine thousand, nine hundred fifty-one".