51255797 has 4 divisors (see below), whose sum is σ = 51270336. Its totient is φ = 51241260.

The previous prime is 51255793. The next prime is 51255811. The reversal of 51255797 is 79755215.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51255797 - 2² = 51255793 is a prime.

It is a super-2 number, since 2×51255797² = 5254313452210418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51255793) 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, 1748 + ... + 10274.

It is an arithmetic number, because the mean of its divisors is an integer number (12817584).

Almost surely, 2^51255797 is an apocalyptic number.

It is an amenable number.

51255797 is a deficient number, since it is larger than the sum of its proper divisors (14539).

51255797 is an equidigital number, since it uses as much as digits as its factorization.

51255797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14538.

The product of its digits is 110250, while the sum is 41.

The square root of 51255797 is about 7159.3154002321. The cubic root of 51255797 is about 371.4619466417.

The spelling of 51255797 in words is "fifty-one million, two hundred fifty-five thousand, seven hundred ninety-seven".