51508801 has 4 divisors (see below), whose sum is σ = 51589552. Its totient is φ = 51428052.

The previous prime is 51508789. The next prime is 51508811. The reversal of 51508801 is 10880515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51508801 - 2¹³ = 51500609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51508801.

It is not an unprimeable number, because it can be changed into a prime (51508811) 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, 39411 + ... + 40696.

It is an arithmetic number, because the mean of its divisors is an integer number (12897388).

Almost surely, 2^51508801 is an apocalyptic number.

It is an amenable number.

51508801 is a deficient number, since it is larger than the sum of its proper divisors (80751).

51508801 is an equidigital number, since it uses as much as digits as its factorization.

51508801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80750.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 51508801 is about 7176.9632157341. The cubic root of 51508801 is about 372.0721354889.

The spelling of 51508801 in words is "fifty-one million, five hundred eight thousand, eight hundred one".