51045394 has 16 divisors (see below), whose sum is σ = 79389720. Its totient is φ = 24586240.

The previous prime is 51045383. The next prime is 51045497. The reversal of 51045394 is 49354015.

It can be written as a sum of positive squares in 4 ways, for example, as 49182169 + 1863225 = 7013^2 + 1365^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36492 + ... + 37864.

Almost surely, 2^51045394 is an apocalyptic number.

51045394 is a deficient number, since it is larger than the sum of its proper divisors (28344326).

51045394 is a wasteful number, since it uses less digits than its factorization.

51045394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 51045394 is about 7144.6059373488. The cubic root of 51045394 is about 370.9529707438.

The spelling of 51045394 in words is "fifty-one million, forty-five thousand, three hundred ninety-four".