55802407 has 4 divisors (see below), whose sum is σ = 55868680. Its totient is φ = 55736136.

The previous prime is 55802389. The next prime is 55802447. The reversal of 55802407 is 70420855.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55802407 is a prime.

It is a super-2 number, since 2×55802407² = 6227817253987298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55802447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31857 + ... + 33562.

It is an arithmetic number, because the mean of its divisors is an integer number (13967170).

Almost surely, 2^55802407 is an apocalyptic number.

55802407 is a deficient number, since it is larger than the sum of its proper divisors (66273).

55802407 is an equidigital number, since it uses as much as digits as its factorization.

55802407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66272.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 55802407 is about 7470.1008694662. The cubic root of 55802407 is about 382.1357279264.

The spelling of 55802407 in words is "fifty-five million, eight hundred two thousand, four hundred seven".