55295391 has 4 divisors (see below), whose sum is σ = 73727192. Its totient is φ = 36863592.

The previous prime is 55295389. The next prime is 55295393. The reversal of 55295391 is 19359255.

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

It is an interprime number because it is at equal distance from previous prime (55295389) and next prime (55295393).

It is not a de Polignac number, because 55295391 - 2¹ = 55295389 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 (55295393) 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, 9215896 + ... + 9215901.

It is an arithmetic number, because the mean of its divisors is an integer number (18431798).

Almost surely, 2^55295391 is an apocalyptic number.

55295391 is a deficient number, since it is larger than the sum of its proper divisors (18431801).

55295391 is a wasteful number, since it uses less digits than its factorization.

55295391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18431800.

The product of its digits is 60750, while the sum is 39.

The square root of 55295391 is about 7436.0870758753. The cubic root of 55295391 is about 380.9748538456.

The spelling of 55295391 in words is "fifty-five million, two hundred ninety-five thousand, three hundred ninety-one".