51755436 has 30 divisors (see below), whose sum is σ = 135299780. Its totient is φ = 17251704.

The previous prime is 51755419. The next prime is 51755437. The reversal of 51755436 is 63455715.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51755436.

It is not an unprimeable number, because it can be changed into a prime (51755437) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 79546 + ... + 80193.

Almost surely, 2^51755436 is an apocalyptic number.

It is an amenable number.

51755436 is an abundant number, since it is smaller than the sum of its proper divisors (83544344).

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

51755436 is a wasteful number, since it uses less digits than its factorization.

51755436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159755 (or 159744 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 51755436 is about 7194.1251031658. The cubic root of 51755436 is about 372.6650434498.

The spelling of 51755436 in words is "fifty-one million, seven hundred fifty-five thousand, four hundred thirty-six".