51425621 has 8 divisors (see below), whose sum is σ = 57168384. Its totient is φ = 45938160.

The previous prime is 51425611. The next prime is 51425641. The reversal of 51425621 is 12652415.

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

It is a cyclic number.

It is not a de Polignac number, because 51425621 - 2⁶ = 51425557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63401 + ... + 64206.

It is an arithmetic number, because the mean of its divisors is an integer number (7146048).

Almost surely, 2^51425621 is an apocalyptic number.

It is an amenable number.

51425621 is a deficient number, since it is larger than the sum of its proper divisors (5742763).

51425621 is a wasteful number, since it uses less digits than its factorization.

51425621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127651.

The product of its digits is 2400, while the sum is 26.

The square root of 51425621 is about 7171.1659442520. The cubic root of 51425621 is about 371.8717449142.

The spelling of 51425621 in words is "fifty-one million, four hundred twenty-five thousand, six hundred twenty-one".