53231202640 has 80 divisors (see below), whose sum is σ = 154301374080. Its totient is φ = 16591541760.

The previous prime is 53231202623. The next prime is 53231202641. The reversal of 53231202640 is 4620213235.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 53231202599 and 53231202608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53231202641) 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, 4314555 + ... + 4326874.

It is an arithmetic number, because the mean of its divisors is an integer number (1928767176).

Almost surely, 2^53231202640 is an apocalyptic number.

It is an amenable number.

53231202640 is an abundant number, since it is smaller than the sum of its proper divisors (101070171440).

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

53231202640 is a wasteful number, since it uses less digits than its factorization.

53231202640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8641460 (or 8641454 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 53231202640 its reverse (4620213235), we get a palindrome (57851415875).

The spelling of 53231202640 in words is "fifty-three billion, two hundred thirty-one million, two hundred two thousand, six hundred forty".