51940879 has 4 divisors (see below), whose sum is σ = 52716184. Its totient is φ = 51165576.

The previous prime is 51940873. The next prime is 51940907. The reversal of 51940879 is 97804915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51940879 - 2⁷ = 51940751 is a prime.

It is a super-2 number, since 2×51940879² = 5395709822585282, 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 (51940873) 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, 387552 + ... + 387685.

It is an arithmetic number, because the mean of its divisors is an integer number (13179046).

Almost surely, 2^51940879 is an apocalyptic number.

51940879 is a deficient number, since it is larger than the sum of its proper divisors (775305).

51940879 is an equidigital number, since it uses as much as digits as its factorization.

51940879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775304.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 51940879 is about 7207.0020813095. The cubic root of 51940879 is about 373.1096070442.

The spelling of 51940879 in words is "fifty-one million, nine hundred forty thousand, eight hundred seventy-nine".