55047031 has 4 divisors (see below), whose sum is σ = 59281432. Its totient is φ = 50812632.

The previous prime is 55047023. The next prime is 55047049. The reversal of 55047031 is 13074055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13074055 = 5 ⋅2614811.

It is not a de Polignac number, because 55047031 - 2³ = 55047023 is a prime.

It is a super-2 number, since 2×55047031² = 6060351243829922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55046987 and 55047005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55047131) 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, 2117181 + ... + 2117206.

It is an arithmetic number, because the mean of its divisors is an integer number (14820358).

Almost surely, 2^55047031 is an apocalyptic number.

55047031 is a deficient number, since it is larger than the sum of its proper divisors (4234401).

55047031 is a wasteful number, since it uses less digits than its factorization.

55047031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234400.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 55047031 is about 7419.3686389072. The cubic root of 55047031 is about 380.4036131675.

The spelling of 55047031 in words is "fifty-five million, forty-seven thousand, thirty-one".