51004231 has 4 divisors (see below), whose sum is σ = 51019072. Its totient is φ = 50989392.

The previous prime is 51004229. The next prime is 51004237. The reversal of 51004231 is 13240015.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51004231 - 2¹ = 51004229 is a prime.

It is a super-2 number, since 2×51004231² = 5202863159802722, 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 (51004237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691 + ... + 10123.

It is an arithmetic number, because the mean of its divisors is an integer number (12754768).

Almost surely, 2^51004231 is an apocalyptic number.

51004231 is a deficient number, since it is larger than the sum of its proper divisors (14841).

51004231 is an equidigital number, since it uses as much as digits as its factorization.

51004231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51004231 is about 7141.7246516510. The cubic root of 51004231 is about 370.8532317844.

Adding to 51004231 its reverse (13240015), we get a palindrome (64244246).

The spelling of 51004231 in words is "fifty-one million, four thousand, two hundred thirty-one".