51750751 has 4 divisors (see below), whose sum is σ = 55731592. Its totient is φ = 47769912.

The previous prime is 51750739. The next prime is 51750763. The reversal of 51750751 is 15705715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15705715 = 5 ⋅3141143.

It is an interprime number because it is at equal distance from previous prime (51750739) and next prime (51750763).

It is a cyclic number.

It is not a de Polignac number, because 51750751 - 2⁵ = 51750719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51750781) 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, 1990401 + ... + 1990426.

It is an arithmetic number, because the mean of its divisors is an integer number (13932898).

Almost surely, 2^51750751 is an apocalyptic number.

51750751 is a deficient number, since it is larger than the sum of its proper divisors (3980841).

51750751 is a wasteful number, since it uses less digits than its factorization.

51750751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980840.

The product of its (nonzero) digits is 6125, while the sum is 31.

The square root of 51750751 is about 7193.7994828880. The cubic root of 51750751 is about 372.6537983288.

The spelling of 51750751 in words is "fifty-one million, seven hundred fifty thousand, seven hundred fifty-one".