51431253 has 8 divisors (see below), whose sum is σ = 69869088. Its totient is φ = 33640464.

The previous prime is 51431249. The next prime is 51431257. The reversal of 51431253 is 35213415.

It is an interprime number because it is at equal distance from previous prime (51431249) and next prime (51431257).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51431253 - 2² = 51431249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161575 + ... + 161892.

It is an arithmetic number, because the mean of its divisors is an integer number (8733636).

Almost surely, 2^51431253 is an apocalyptic number.

51431253 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51431253 is a deficient number, since it is larger than the sum of its proper divisors (18437835).

51431253 is a wasteful number, since it uses less digits than its factorization.

51431253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323523.

The product of its digits is 1800, while the sum is 24.

The square root of 51431253 is about 7171.5586172045. The cubic root of 51431253 is about 371.8853198934.

Adding to 51431253 its reverse (35213415), we get a palindrome (86644668).

The spelling of 51431253 in words is "fifty-one million, four hundred thirty-one thousand, two hundred fifty-three".