55301640 has 64 divisors (see below), whose sum is σ = 167650560. Its totient is φ = 14592000.

The previous prime is 55301639. The next prime is 55301651. The reversal of 55301640 is 4610355.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55301640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9265 + ... + 14015.

It is an arithmetic number, because the mean of its divisors is an integer number (2619540).

Almost surely, 2^55301640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55301640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83825280).

55301640 is an abundant number, since it is smaller than the sum of its proper divisors (112348920).

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

55301640 is a wasteful number, since it uses less digits than its factorization.

55301640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862 (or 4858 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 55301640 is about 7436.5072446680. The cubic root of 55301640 is about 380.9892047837.

Adding to 55301640 its reverse (4610355), we get a palindrome (59911995).

The spelling of 55301640 in words is "fifty-five million, three hundred one thousand, six hundred forty".