51150690 has 40 divisors (see below), whose sum is σ = 137540700. Its totient is φ = 13639968.

The previous prime is 51150677. The next prime is 51150691. The reversal of 51150690 is 9605115.

It can be written as a sum of positive squares in 2 ways, for example, as 49154121 + 1996569 = 7011^2 + 1413^2 .

It is a super-2 number, since 2×51150690² = 5232786174952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51150691) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30765 + ... + 32384.

Almost surely, 2^51150690 is an apocalyptic number.

51150690 is an abundant number, since it is smaller than the sum of its proper divisors (86390010).

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

51150690 is a wasteful number, since it uses less digits than its factorization.

51150690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63168 (or 63159 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 51150690 is about 7151.9710569884. The cubic root of 51150690 is about 371.2078617616.

The spelling of 51150690 in words is "fifty-one million, one hundred fifty thousand, six hundred ninety".