653221432 has 8 divisors (see below), whose sum is σ = 1224790200. Its totient is φ = 326610712.

The previous prime is 653221409. The next prime is 653221451. The reversal of 653221432 is 234122356.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 653221432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40826332 + ... + 40826347.

It is an arithmetic number, because the mean of its divisors is an integer number (153098775).

Almost surely, 2^653221432 is an apocalyptic number.

It is an amenable number.

653221432 is a deficient number, since it is larger than the sum of its proper divisors (571568768).

653221432 is a wasteful number, since it uses less digits than its factorization.

653221432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81652685 (or 81652681 counting only the distinct ones).

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

The square root of 653221432 is about 25558.1969630097. The cubic root of 653221432 is about 867.6677889424.

Adding to 653221432 its reverse (234122356), we get a palindrome (887343788).

The spelling of 653221432 in words is "six hundred fifty-three million, two hundred twenty-one thousand, four hundred thirty-two".