51097365 has 64 divisors (see below), whose sum is σ = 104371200. Its totient is φ = 23457600.

The previous prime is 51097339. The next prime is 51097379. The reversal of 51097365 is 56379015.

It is a happy number.

It is not a de Polignac number, because 51097365 - 2¹² = 51093269 is a prime.

It is a super-2 number, since 2×51097365² = 5221881419886450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27310 + ... + 29120.

It is an arithmetic number, because the mean of its divisors is an integer number (1630800).

Almost surely, 2^51097365 is an apocalyptic number.

51097365 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51097365 is an abundant number, since it is smaller than the sum of its proper divisors (53273835).

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

51097365 is a wasteful number, since it uses less digits than its factorization.

51097365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855 (or 1849 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 51097365 is about 7148.2420915915. The cubic root of 51097365 is about 371.0788211959.

The spelling of 51097365 in words is "fifty-one million, ninety-seven thousand, three hundred sixty-five".