55624251 has 8 divisors (see below), whose sum is σ = 74214400. Its totient is φ = 37058472.

The previous prime is 55624243. The next prime is 55624259. The reversal of 55624251 is 15242655.

It is an interprime number because it is at equal distance from previous prime (55624243) and next prime (55624259).

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

It is not a de Polignac number, because 55624251 - 2³ = 55624243 is a prime.

It is a super-2 number, since 2×55624251² = 6188114598622002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55624259) 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, 150 + ... + 10548.

It is an arithmetic number, because the mean of its divisors is an integer number (9276800).

Almost surely, 2^55624251 is an apocalyptic number.

55624251 is a deficient number, since it is larger than the sum of its proper divisors (18590149).

55624251 is a wasteful number, since it uses less digits than its factorization.

55624251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12185.

The product of its digits is 12000, while the sum is 30.

The square root of 55624251 is about 7458.1667318450. The cubic root of 55624251 is about 381.7286227125.

The spelling of 55624251 in words is "fifty-five million, six hundred twenty-four thousand, two hundred fifty-one".