51128290 has 16 divisors (see below), whose sum is σ = 94171968. Its totient is φ = 19975536.

The previous prime is 51128281. The next prime is 51128291. The reversal of 51128290 is 9282115.

It is a super-2 number, since 2×51128290² = 5228204076648200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51128291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59022 + ... + 59881.

It is an arithmetic number, because the mean of its divisors is an integer number (5885748).

Almost surely, 2^51128290 is an apocalyptic number.

51128290 is a deficient number, since it is larger than the sum of its proper divisors (43043678).

51128290 is a wasteful number, since it uses less digits than its factorization.

51128290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118953.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 51128290 is about 7150.4048836412. The cubic root of 51128290 is about 371.1536671835.

The spelling of 51128290 in words is "fifty-one million, one hundred twenty-eight thousand, two hundred ninety".