51775542 has 96 divisors (see below), whose sum is σ = 140282688. Its totient is φ = 13436928.

The previous prime is 51775501. The next prime is 51775561. The reversal of 51775542 is 24557715.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51775497 and 51775506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119358 + ... + 119790.

It is an arithmetic number, because the mean of its divisors is an integer number (1461278).

Almost surely, 2^51775542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51775542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70141344).

51775542 is an abundant number, since it is smaller than the sum of its proper divisors (88507146).

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

51775542 is a wasteful number, since it uses less digits than its factorization.

51775542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 531 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 51775542 is about 7195.5223576888. The cubic root of 51775542 is about 372.7132949565.

The spelling of 51775542 in words is "fifty-one million, seven hundred seventy-five thousand, five hundred forty-two".