51046690 has 8 divisors (see below), whose sum is σ = 91884060. Its totient is φ = 20418672.

The previous prime is 51046687. The next prime is 51046693. The reversal of 51046690 is 9664015.

It is an interprime number because it is at equal distance from previous prime (51046687) and next prime (51046693).

It can be written as a sum of positive squares in 2 ways, for example, as 49744809 + 1301881 = 7053^2 + 1141^2 .

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

It is a super-2 number, since 2×51046690² = 5211529119912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51046693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2552325 + ... + 2552344.

Almost surely, 2^51046690 is an apocalyptic number.

51046690 is a deficient number, since it is larger than the sum of its proper divisors (40837370).

51046690 is a wasteful number, since it uses less digits than its factorization.

51046690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104676.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 51046690 is about 7144.6966345675. The cubic root of 51046690 is about 370.9561101128.

The spelling of 51046690 in words is "fifty-one million, forty-six thousand, six hundred ninety".