55530425 has 6 divisors (see below), whose sum is σ = 68857758. Its totient is φ = 44424320.

The previous prime is 55530421. The next prime is 55530473. The reversal of 55530425 is 52403555.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 17732521 + 37797904 = 4211^2 + 6148^2 .

It is not a de Polignac number, because 55530425 - 2² = 55530421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1110584 + ... + 1110633.

It is an arithmetic number, because the mean of its divisors is an integer number (11476293).

Almost surely, 2^55530425 is an apocalyptic number.

It is an amenable number.

55530425 is a deficient number, since it is larger than the sum of its proper divisors (13327333).

55530425 is a wasteful number, since it uses less digits than its factorization.

55530425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221227 (or 2221222 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 55530425 is about 7451.8739253962. The cubic root of 55530425 is about 381.5138708973.

It can be divided in two parts, 55530 and 425, that added together give a palindrome (55955).

The spelling of 55530425 in words is "fifty-five million, five hundred thirty thousand, four hundred twenty-five".