51490634 has 8 divisors (see below), whose sum is σ = 83177220. Its totient is φ = 23764896.

The previous prime is 51490633. The next prime is 51490661. The reversal of 51490634 is 43609415.

51490634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 45225625 + 6265009 = 6725^2 + 2503^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51490634.

It is not an unprimeable number, because it can be changed into a prime (51490633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990179 + ... + 990230.

Almost surely, 2^51490634 is an apocalyptic number.

51490634 is a deficient number, since it is larger than the sum of its proper divisors (31686586).

51490634 is a wasteful number, since it uses less digits than its factorization.

51490634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980424.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 51490634 is about 7175.6974573905. The cubic root of 51490634 is about 372.0283874356.

The spelling of 51490634 in words is "fifty-one million, four hundred ninety thousand, six hundred thirty-four".