55453240 has 32 divisors (see below), whose sum is σ = 125609760. Its totient is φ = 22032000.

The previous prime is 55453199. The next prime is 55453241. The reversal of 55453240 is 4235455.

It is a junction number, because it is equal to n+sod(n) for n = 55453199 and 55453208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55453241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1450 + ... + 10630.

It is an arithmetic number, because the mean of its divisors is an integer number (3925305).

Almost surely, 2^55453240 is an apocalyptic number.

It is an amenable number.

55453240 is an abundant number, since it is smaller than the sum of its proper divisors (70156520).

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

55453240 is a wasteful number, since it uses less digits than its factorization.

55453240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9343 (or 9339 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55453240 is about 7446.6932258554. The cubic root of 55453240 is about 381.3370260889.

Adding to 55453240 its reverse (4235455), we get a palindrome (59688695).

The spelling of 55453240 in words is "fifty-five million, four hundred fifty-three thousand, two hundred forty".