51348690 has 48 divisors (see below), whose sum is σ = 133981848. Its totient is φ = 13644288.

The previous prime is 51348683. The next prime is 51348709. The reversal of 51348690 is 9684315.

It can be written as a sum of positive squares in 4 ways, for example, as 32867289 + 18481401 = 5733^2 + 4299^2 .

It is a super-2 number, since 2×51348690² = 5273375929432200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29484 + ... + 31176.

Almost surely, 2^51348690 is an apocalyptic number.

51348690 is an abundant number, since it is smaller than the sum of its proper divisors (82633158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51348690 is a wasteful number, since it uses less digits than its factorization.

51348690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043 (or 2040 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 51348690 is about 7165.8000251193. The cubic root of 51348690 is about 371.6862164928.

It can be divided in two parts, 5134 and 8690, that added together give a cube (13824 = 24³).

The spelling of 51348690 in words is "fifty-one million, three hundred forty-eight thousand, six hundred ninety".