51731001 has 16 divisors (see below), whose sum is σ = 87587200. Its totient is φ = 29560464.

The previous prime is 51730999. The next prime is 51731011. The reversal of 51731001 is 10013715.

It is a happy number.

51731001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51731001 - 2¹ = 51730999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51731011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136666 + ... + 137043.

It is an arithmetic number, because the mean of its divisors is an integer number (5474200).

Almost surely, 2^51731001 is an apocalyptic number.

It is an amenable number.

51731001 is a deficient number, since it is larger than the sum of its proper divisors (35856199).

51731001 is a wasteful number, since it uses less digits than its factorization.

51731001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273725 (or 273719 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 18.

The square root of 51731001 is about 7192.4266419617. The cubic root of 51731001 is about 372.6063861410.

Adding to 51731001 its reverse (10013715), we get a palindrome (61744716).

The spelling of 51731001 in words is "fifty-one million, seven hundred thirty-one thousand, one".