55425513 has 16 divisors (see below), whose sum is σ = 86821056. Its totient is φ = 31007040.

The previous prime is 55425499. The next prime is 55425521. The reversal of 55425513 is 31552455.

It is a happy number.

It is not a de Polignac number, because 55425513 - 2⁴ = 55425497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55425113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64170 + ... + 65027.

It is an arithmetic number, because the mean of its divisors is an integer number (5426316).

Almost surely, 2^55425513 is an apocalyptic number.

It is an amenable number.

55425513 is a deficient number, since it is larger than the sum of its proper divisors (31395543).

55425513 is a wasteful number, since it uses less digits than its factorization.

55425513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129224.

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

The square root of 55425513 is about 7444.8312942605. The cubic root of 55425513 is about 381.2734584509.

Adding to 55425513 its reverse (31552455), we get a palindrome (86977968).

The spelling of 55425513 in words is "fifty-five million, four hundred twenty-five thousand, five hundred thirteen".