55145504 has 24 divisors (see below), whose sum is σ = 109142460. Its totient is φ = 27426816.

The previous prime is 55145491. The next prime is 55145507. The reversal of 55145504 is 40554155.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45535504 + 9610000 = 6748^2 + 3100^2 .

It is a super-2 number, since 2×55145504² = 6082053222828032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55145507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1712 + ... + 10640.

Almost surely, 2^55145504 is an apocalyptic number.

It is an amenable number.

55145504 is a deficient number, since it is larger than the sum of its proper divisors (53996956).

55145504 is a wasteful number, since it uses less digits than its factorization.

55145504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9132 (or 9124 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 55145504 is about 7426.0018852677. The cubic root of 55145504 is about 380.6303112567.

Adding to 55145504 its reverse (40554155), we get a palindrome (95699659).

The spelling of 55145504 in words is "fifty-five million, one hundred forty-five thousand, five hundred four".