55401863 has 4 divisors (see below), whose sum is σ = 60438408. Its totient is φ = 50365320.

The previous prime is 55401859. The next prime is 55401869. The reversal of 55401863 is 36810455.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55401863 - 2² = 55401859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55401869) 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, 2518256 + ... + 2518277.

It is an arithmetic number, because the mean of its divisors is an integer number (15109602).

Almost surely, 2^55401863 is an apocalyptic number.

55401863 is a deficient number, since it is larger than the sum of its proper divisors (5036545).

55401863 is a wasteful number, since it uses less digits than its factorization.

55401863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036544.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 55401863 is about 7443.2427744902. The cubic root of 55401863 is about 381.2192210931.

The spelling of 55401863 in words is "fifty-five million, four hundred one thousand, eight hundred sixty-three".