51132431 has 12 divisors (see below), whose sum is σ = 59755608. Its totient is φ = 43625232.

The previous prime is 51132397. The next prime is 51132449. The reversal of 51132431 is 13423115.

It is not a de Polignac number, because 51132431 - 2¹⁴ = 51116047 is a prime.

It is a super-2 number, since 2×51132431² = 5229050999939522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132451) 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 11 ways as a sum of consecutive naturals, for example, 8825 + ... + 13421.

It is an arithmetic number, because the mean of its divisors is an integer number (4979634).

Almost surely, 2^51132431 is an apocalyptic number.

51132431 is a deficient number, since it is larger than the sum of its proper divisors (8623177).

51132431 is a wasteful number, since it uses less digits than its factorization.

51132431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838 (or 4831 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 51132431 is about 7150.6944418007. The cubic root of 51132431 is about 371.1636871147.

Adding to 51132431 its reverse (13423115), we get a palindrome (64555546).

The spelling of 51132431 in words is "fifty-one million, one hundred thirty-two thousand, four hundred thirty-one".