55404731 has 2 divisors, whose sum is σ = 55404732. Its totient is φ = 55404730.

The previous prime is 55404697. The next prime is 55404733. The reversal of 55404731 is 13740455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55404731 - 2⁶ = 55404667 is a prime.

It is a super-2 number, since 2×55404731² = 6139368434364722, which contains 22 as substring.

Together with 55404733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55404694 and 55404703.

It is not a weakly prime, because it can be changed into another prime (55404733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27702365 + 27702366.

It is an arithmetic number, because the mean of its divisors is an integer number (27702366).

Almost surely, 2^55404731 is an apocalyptic number.

55404731 is a deficient number, since it is larger than the sum of its proper divisors (1).

55404731 is an equidigital number, since it uses as much as digits as its factorization.

55404731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 55404731 is about 7443.4354299611. The cubic root of 55404731 is about 381.2257991984.

The spelling of 55404731 in words is "fifty-five million, four hundred four thousand, seven hundred thirty-one".