51350731 has 4 divisors (see below), whose sum is σ = 51575200. Its totient is φ = 51126264.

The previous prime is 51350699. The next prime is 51350771. The reversal of 51350731 is 13705315.

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 51350731 - 2⁵ = 51350699 is a prime.

It is a super-2 number, since 2×51350731² = 5273795148468722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51350696 and 51350705.

It is not an unprimeable number, because it can be changed into a prime (51350771) 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, 111891 + ... + 112348.

It is an arithmetic number, because the mean of its divisors is an integer number (12893800).

Almost surely, 2^51350731 is an apocalyptic number.

51350731 is a deficient number, since it is larger than the sum of its proper divisors (224469).

51350731 is a wasteful number, since it uses less digits than its factorization.

51350731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224468.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 51350731 is about 7165.9424362745. The cubic root of 51350731 is about 371.6911410035.

The spelling of 51350731 in words is "fifty-one million, three hundred fifty thousand, seven hundred thirty-one".