51431442 has 64 divisors (see below), whose sum is σ = 114739200. Its totient is φ = 15301440.

The previous prime is 51431441. The next prime is 51431453. The reversal of 51431442 is 24413415.

It is not an unprimeable number, because it can be changed into a prime (51431441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155217 + ... + 155547.

It is an arithmetic number, because the mean of its divisors is an integer number (1792800).

Almost surely, 2^51431442 is an apocalyptic number.

51431442 is an abundant number, since it is smaller than the sum of its proper divisors (63307758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51431442 is a wasteful number, since it uses less digits than its factorization.

51431442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431.

The product of its digits is 1920, while the sum is 24.

The square root of 51431442 is about 7171.5717942443. The cubic root of 51431442 is about 371.8857754287.

Adding to 51431442 its reverse (24413415), we get a palindrome (75844857).

The spelling of 51431442 in words is "fifty-one million, four hundred thirty-one thousand, four hundred forty-two".