52231450644 has 30 divisors (see below), whose sum is σ = 136543330154. Its totient is φ = 17410483440.

The previous prime is 52231450639. The next prime is 52231450669. The reversal of 52231450644 is 44605413225.

52231450644 is a `hidden beast` number, since 5 + 2 + 2 + 3 + 1 + 4 + 5 + 0 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50261156100 + 1970294544 = 224190^2 + 44388^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 52231450599 and 52231450608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 80603767 + ... + 80604414.

Almost surely, 2^52231450644 is an apocalyptic number.

52231450644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

52231450644 is an abundant number, since it is smaller than the sum of its proper divisors (84311879510).

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

52231450644 is a wasteful number, since it uses less digits than its factorization.

52231450644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161208197 (or 161208186 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 52231450644 its reverse (44605413225), we get a palindrome (96836863869).

The spelling of 52231450644 in words is "fifty-two billion, two hundred thirty-one million, four hundred fifty thousand, six hundred forty-four".