51535368 has 48 divisors (see below), whose sum is σ = 139950720. Its totient is φ = 17132256.

The previous prime is 51535357. The next prime is 51535369. The reversal of 51535368 is 86353515.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51535369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35505 + ... + 36927.

It is an arithmetic number, because the mean of its divisors is an integer number (2915640).

Almost surely, 2^51535368 is an apocalyptic number.

It is an amenable number.

51535368 is an abundant number, since it is smaller than the sum of its proper divisors (88415352).

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

51535368 is a wasteful number, since it uses less digits than its factorization.

51535368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1931 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 51535368 is about 7178.8138295961. The cubic root of 51535368 is about 372.1360931121.

The spelling of 51535368 in words is "fifty-one million, five hundred thirty-five thousand, three hundred sixty-eight".