51115374 has 20 divisors (see below), whose sum is σ = 114536664. Its totient is φ = 17038404.

The previous prime is 51115369. The next prime is 51115381. The reversal of 51115374 is 47351115.

It is a super-2 number, since 2×51115374² = 5225562918319752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 157602 + ... + 157925.

Almost surely, 2^51115374 is an apocalyptic number.

51115374 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51115374 is an abundant number, since it is smaller than the sum of its proper divisors (63421290).

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

51115374 is a wasteful number, since it uses less digits than its factorization.

51115374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315541 (or 315532 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 51115374 is about 7149.5016609551. The cubic root of 51115374 is about 371.1224110075.

Adding to 51115374 its reverse (47351115), we get a palindrome (98466489).

The spelling of 51115374 in words is "fifty-one million, one hundred fifteen thousand, three hundred seventy-four".