55990751 has 2 divisors, whose sum is σ = 55990752. Its totient is φ = 55990750.

The previous prime is 55990747. The next prime is 55990787. The reversal of 55990751 is 15709955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55990751 - 2² = 55990747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55990699 and 55990708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55996751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27995375 + 27995376.

It is an arithmetic number, because the mean of its divisors is an integer number (27995376).

Almost surely, 2^55990751 is an apocalyptic number.

55990751 is a deficient number, since it is larger than the sum of its proper divisors (1).

55990751 is an equidigital number, since it uses as much as digits as its factorization.

55990751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70875, while the sum is 41.

The square root of 55990751 is about 7482.6967732229. The cubic root of 55990751 is about 382.5651726561.

The spelling of 55990751 in words is "fifty-five million, nine hundred ninety thousand, seven hundred fifty-one".