51490946 has 16 divisors (see below), whose sum is σ = 83945400. Its totient is φ = 23545728.

The previous prime is 51490937. The next prime is 51490987. The reversal of 51490946 is 64909415.

It can be written as a sum of positive squares in 4 ways, for example, as 30924721 + 20566225 = 5561^2 + 4535^2 .

It is a super-3 number, since 3×51490946³ (a number of 24 digits) contains 333 as substring.

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, 6251 + ... + 11918.

Almost surely, 2^51490946 is an apocalyptic number.

51490946 is a deficient number, since it is larger than the sum of its proper divisors (32454454).

51490946 is a wasteful number, since it uses less digits than its factorization.

51490946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18293.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 51490946 is about 7175.7191974045. The cubic root of 51490946 is about 372.0291388513.

The spelling of 51490946 in words is "fifty-one million, four hundred ninety thousand, nine hundred forty-six".