51925181 has 16 divisors (see below), whose sum is σ = 65473920. Its totient is φ = 40001280.

The previous prime is 51925169. The next prime is 51925189. The reversal of 51925181 is 18152915.

It is not a de Polignac number, because 51925181 - 2¹⁰ = 51924157 is a prime.

It is a super-2 number, since 2×51925181² = 5392448843765522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51925189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3065 + ... + 10641.

It is an arithmetic number, because the mean of its divisors is an integer number (4092120).

Almost surely, 2^51925181 is an apocalyptic number.

It is an amenable number.

51925181 is a deficient number, since it is larger than the sum of its proper divisors (13548739).

51925181 is a wasteful number, since it uses less digits than its factorization.

51925181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7684.

The product of its digits is 3600, while the sum is 32.

The square root of 51925181 is about 7205.9129192629. The cubic root of 51925181 is about 373.0720151713.

The spelling of 51925181 in words is "fifty-one million, nine hundred twenty-five thousand, one hundred eighty-one".