55233831 has 4 divisors (see below), whose sum is σ = 73645112. Its totient is φ = 36822552.

The previous prime is 55233823. The next prime is 55233839. The reversal of 55233831 is 13833255.

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 (55233823) and next prime (55233839).

It is not a de Polignac number, because 55233831 - 2³ = 55233823 is a prime.

It is a super-2 number, since 2×55233831² = 6101552173873122, 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 (55233839) 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, 9205636 + ... + 9205641.

It is an arithmetic number, because the mean of its divisors is an integer number (18411278).

Almost surely, 2^55233831 is an apocalyptic number.

55233831 is a deficient number, since it is larger than the sum of its proper divisors (18411281).

55233831 is a wasteful number, since it uses less digits than its factorization.

55233831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18411280.

The product of its digits is 10800, while the sum is 30.

The square root of 55233831 is about 7431.9466494318. The cubic root of 55233831 is about 380.8334224035.

The spelling of 55233831 in words is "fifty-five million, two hundred thirty-three thousand, eight hundred thirty-one".