51552207 has 24 divisors (see below), whose sum is σ = 88256896. Its totient is φ = 29457432.

The previous prime is 51552191. The next prime is 51552217. The reversal of 51552207 is 70225515.

It is a happy number.

It is not a de Polignac number, because 51552207 - 2⁴ = 51552191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51552217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13453 + ... + 16854.

Almost surely, 2^51552207 is an apocalyptic number.

51552207 is a deficient number, since it is larger than the sum of its proper divisors (36704689).

51552207 is an equidigital number, since it uses as much as digits as its factorization.

51552207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30329 (or 30317 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 51552207 is about 7179.9865598760. The cubic root of 51552207 is about 372.1766200843.

The spelling of 51552207 in words is "fifty-one million, five hundred fifty-two thousand, two hundred seven".