51553425 has 96 divisors (see below), whose sum is σ = 108564480. Its totient is φ = 20966400.

The previous prime is 51553421. The next prime is 51553451. The reversal of 51553425 is 52435515.

It is a happy number.

It is not a de Polignac number, because 51553425 - 2² = 51553421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51553392 and 51553401.

It is not an unprimeable number, because it can be changed into a prime (51553421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 456169 + ... + 456281.

It is an arithmetic number, because the mean of its divisors is an integer number (1130880).

Almost surely, 2^51553425 is an apocalyptic number.

51553425 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51553425 is an abundant number, since it is smaller than the sum of its proper divisors (57011055).

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

51553425 is a wasteful number, since it uses less digits than its factorization.

51553425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 218 counting only the distinct ones).

The product of its digits is 15000, while the sum is 30.

The square root of 51553425 is about 7180.0713784753. The cubic root of 51553425 is about 372.1795511425.

The spelling of 51553425 in words is "fifty-one million, five hundred fifty-three thousand, four hundred twenty-five".