55403831 has 8 divisors (see below), whose sum is σ = 63367584. Its totient is φ = 47452320.

The previous prime is 55403827. The next prime is 55403839. The reversal of 55403831 is 13830455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55403831 - 2² = 55403827 is a prime.

It is a super-2 number, since 2×55403831² = 6139168978953122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55403794 and 55403803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55403839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10901 + ... + 15153.

It is an arithmetic number, because the mean of its divisors is an integer number (7920948).

Almost surely, 2^55403831 is an apocalyptic number.

55403831 is a deficient number, since it is larger than the sum of its proper divisors (7963753).

55403831 is a wasteful number, since it uses less digits than its factorization.

55403831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6121.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55403831 is about 7443.3749737602. The cubic root of 55403831 is about 381.2237349639.

The spelling of 55403831 in words is "fifty-five million, four hundred three thousand, eight hundred thirty-one".