51429372 has 24 divisors (see below), whose sum is σ = 123873792. Its totient is φ = 16590000.

The previous prime is 51429359. The next prime is 51429379. The reversal of 51429372 is 27392415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51429379) 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, 68754 + ... + 69497.

It is an arithmetic number, because the mean of its divisors is an integer number (5161408).

Almost surely, 2^51429372 is an apocalyptic number.

It is an amenable number.

51429372 is an abundant number, since it is smaller than the sum of its proper divisors (72444420).

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

51429372 is a wasteful number, since it uses less digits than its factorization.

51429372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138289 (or 138287 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 51429372 is about 7171.4274729652. The cubic root of 51429372 is about 371.8807861727.

The spelling of 51429372 in words is "fifty-one million, four hundred twenty-nine thousand, three hundred seventy-two".