51325555 has 8 divisors (see below), whose sum is σ = 64832400. Its totient is φ = 38899296.

The previous prime is 51325523. The next prime is 51325559. The reversal of 51325555 is 55552315.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51325555 - 2⁵ = 51325523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51325559) 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, 270040 + ... + 270229.

It is an arithmetic number, because the mean of its divisors is an integer number (8104050).

Almost surely, 2^51325555 is an apocalyptic number.

51325555 is a deficient number, since it is larger than the sum of its proper divisors (13506845).

51325555 is a wasteful number, since it uses less digits than its factorization.

51325555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540293.

The product of its digits is 18750, while the sum is 31.

The square root of 51325555 is about 7164.1855782775. The cubic root of 51325555 is about 371.6303873999.

The spelling of 51325555 in words is "fifty-one million, three hundred twenty-five thousand, five hundred fifty-five".