51997374 has 48 divisors (see below), whose sum is σ = 132363504. Its totient is φ = 14544000.

The previous prime is 51997333. The next prime is 51997381. The reversal of 51997374 is 47379915.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7527 + ... + 12674.

It is an arithmetic number, because the mean of its divisors is an integer number (2757573).

Almost surely, 2^51997374 is an apocalyptic number.

51997374 is an abundant number, since it is smaller than the sum of its proper divisors (80366130).

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

51997374 is a wasteful number, since it uses less digits than its factorization.

51997374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20233 (or 20230 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 51997374 is about 7210.9204682897. The cubic root of 51997374 is about 373.2448325155.

The spelling of 51997374 in words is "fifty-one million, nine hundred ninety-seven thousand, three hundred seventy-four".