51425420 has 24 divisors (see below), whose sum is σ = 110506704. Its totient is φ = 20091456.

The previous prime is 51425417. The next prime is 51425431. The reversal of 51425420 is 2452415.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29039 + ... + 30758.

It is an arithmetic number, because the mean of its divisors is an integer number (4604446).

Almost surely, 2^51425420 is an apocalyptic number.

It is an amenable number.

51425420 is an abundant number, since it is smaller than the sum of its proper divisors (59081284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51425420 is a wasteful number, since it uses less digits than its factorization.

51425420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59849 (or 59847 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 51425420 is about 7171.1519297809. The cubic root of 51425420 is about 371.8712604195.

Adding to 51425420 its reverse (2452415), we get a palindrome (53877835).

The spelling of 51425420 in words is "fifty-one million, four hundred twenty-five thousand, four hundred twenty".