655138132 has 24 divisors (see below), whose sum is σ = 1284524640. Its totient is φ = 289740960.

The previous prime is 655138103. The next prime is 655138147. The reversal of 655138132 is 231831556.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199582 + ... + 202837.

It is an arithmetic number, because the mean of its divisors is an integer number (53521860).

Almost surely, 2^655138132 is an apocalyptic number.

It is an amenable number.

655138132 is a deficient number, since it is larger than the sum of its proper divisors (629386508).

655138132 is a wasteful number, since it uses less digits than its factorization.

655138132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402471 (or 402469 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 655138132 is about 25595.6662738050. Note that the first 3 decimals coincide. The cubic root of 655138132 is about 868.5156050216.

Adding to 655138132 its reverse (231831556), we get a palindrome (886969688).

The spelling of 655138132 in words is "six hundred fifty-five million, one hundred thirty-eight thousand, one hundred thirty-two".