51425331 has 4 divisors (see below), whose sum is σ = 68567112. Its totient is φ = 34283552.

The previous prime is 51425321. The next prime is 51425333. The reversal of 51425331 is 13352415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51425331 - 2⁵ = 51425299 is a prime.

It is a super-2 number, since 2×51425331² = 5289129336919122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51425333) 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, 8570886 + ... + 8570891.

It is an arithmetic number, because the mean of its divisors is an integer number (17141778).

Almost surely, 2^51425331 is an apocalyptic number.

51425331 is a deficient number, since it is larger than the sum of its proper divisors (17141781).

51425331 is a wasteful number, since it uses less digits than its factorization.

51425331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17141780.

The product of its digits is 1800, while the sum is 24.

The square root of 51425331 is about 7171.1457243595. The cubic root of 51425331 is about 371.8710458916.

Adding to 51425331 its reverse (13352415), we get a palindrome (64777746).

The spelling of 51425331 in words is "fifty-one million, four hundred twenty-five thousand, three hundred thirty-one".