51977801 has 4 divisors (see below), whose sum is σ = 52042704. Its totient is φ = 51912900.

The previous prime is 51977797. The next prime is 51977803. The reversal of 51977801 is 10877915.

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 51977801 - 2² = 51977797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51977803) 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, 31235 + ... + 32856.

It is an arithmetic number, because the mean of its divisors is an integer number (13010676).

Almost surely, 2^51977801 is an apocalyptic number.

It is an amenable number.

51977801 is a deficient number, since it is larger than the sum of its proper divisors (64903).

51977801 is an equidigital number, since it uses as much as digits as its factorization.

51977801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64902.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 51977801 is about 7209.5631629108. The cubic root of 51977801 is about 373.1979940094.

The spelling of 51977801 in words is "fifty-one million, nine hundred seventy-seven thousand, eight hundred one".