51170890 has 8 divisors (see below), whose sum is σ = 92107620. Its totient is φ = 20468352.

The previous prime is 51170881. The next prime is 51170891. The reversal of 51170890 is 9807115.

It can be written as a sum of positive squares in 2 ways, for example, as 50168889 + 1002001 = 7083^2 + 1001^2 .

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

It is a super-3 number, since 3×51170890³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51170891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558535 + ... + 2558554.

Almost surely, 2^51170890 is an apocalyptic number.

51170890 is a deficient number, since it is larger than the sum of its proper divisors (40936730).

51170890 is a wasteful number, since it uses less digits than its factorization.

51170890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117096.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 51170890 is about 7153.3831157013. The cubic root of 51170890 is about 371.2567200921.

The spelling of 51170890 in words is "fifty-one million, one hundred seventy thousand, eight hundred ninety".