51788045 has 4 divisors (see below), whose sum is σ = 62145660. Its totient is φ = 41430432.

The previous prime is 51788021. The next prime is 51788047. The reversal of 51788045 is 54088715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54088715 = 5 ⋅10817743.

It can be written as a sum of positive squares in 2 ways, for example, as 26245129 + 25542916 = 5123^2 + 5054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51788045 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51788047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5178800 + ... + 5178809.

It is an arithmetic number, because the mean of its divisors is an integer number (15536415).

Almost surely, 2^51788045 is an apocalyptic number.

It is an amenable number.

51788045 is a deficient number, since it is larger than the sum of its proper divisors (10357615).

51788045 is a wasteful number, since it uses less digits than its factorization.

51788045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10357614.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 51788045 is about 7196.3911094381. The cubic root of 51788045 is about 372.7432940583.

The spelling of 51788045 in words is "fifty-one million, seven hundred eighty-eight thousand, forty-five".