51358394 has 8 divisors (see below), whose sum is σ = 81569268. Its totient is φ = 24168640.

The previous prime is 51358393. The next prime is 51358397. The reversal of 51358394 is 49385315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38130625 + 13227769 = 6175^2 + 3637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51358393) 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, 755237 + ... + 755304.

Almost surely, 2^51358394 is an apocalyptic number.

51358394 is a deficient number, since it is larger than the sum of its proper divisors (30210874).

51358394 is a wasteful number, since it uses less digits than its factorization.

51358394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510560.

The product of its digits is 64800, while the sum is 38.

The square root of 51358394 is about 7166.4770982680. The cubic root of 51358394 is about 371.7096290723.

The spelling of 51358394 in words is "fifty-one million, three hundred fifty-eight thousand, three hundred ninety-four".