51207723 has 48 divisors (see below), whose sum is σ = 90417600. Its totient is φ = 27260928.

The previous prime is 51207701. The next prime is 51207733. The reversal of 51207723 is 32770215.

It is not a de Polignac number, because 51207723 - 2⁶ = 51207659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51207733) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 146553 + ... + 146901.

It is an arithmetic number, because the mean of its divisors is an integer number (1883700).

Almost surely, 2^51207723 is an apocalyptic number.

51207723 is a deficient number, since it is larger than the sum of its proper divisors (39209877).

51207723 is a wasteful number, since it uses less digits than its factorization.

51207723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 51207723 is about 7155.9571686812. The cubic root of 51207723 is about 371.3457760579.

Adding to 51207723 its reverse (32770215), we get a palindrome (83977938).

The spelling of 51207723 in words is "fifty-one million, two hundred seven thousand, seven hundred twenty-three".