655221434 has 12 divisors (see below), whose sum is σ = 1143294714. Its totient is φ = 280809144.

The previous prime is 655221383. The next prime is 655221439. The reversal of 655221434 is 434122556.

It can be written as a sum of positive squares in only one way, i.e., 413512225 + 241709209 = 20335^2 + 15547^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 655221434.

It is not an unprimeable number, because it can be changed into a prime (655221439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3342869 + ... + 3343064.

Almost surely, 2^655221434 is an apocalyptic number.

655221434 is a deficient number, since it is larger than the sum of its proper divisors (488073280).

655221434 is a wasteful number, since it uses less digits than its factorization.

655221434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6685949 (or 6685942 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 655221434 is about 25597.2934897422. The cubic root of 655221434 is about 868.5524145722.

The spelling of 655221434 in words is "six hundred fifty-five million, two hundred twenty-one thousand, four hundred thirty-four".