155653212 has 96 divisors (see below), whose sum is σ = 433972224. Its totient is φ = 42796800.

The previous prime is 155653193. The next prime is 155653243. The reversal of 155653212 is 212356551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 155653212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103933 + ... + 105419.

It is an arithmetic number, because the mean of its divisors is an integer number (4520544).

Almost surely, 2^155653212 is an apocalyptic number.

155653212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155653212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216986112).

155653212 is an abundant number, since it is smaller than the sum of its proper divisors (278319012).

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

155653212 is a wasteful number, since it uses less digits than its factorization.

155653212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579 (or 1577 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 155653212 is about 12476.1056423870. The cubic root of 155653212 is about 537.9220692066.

The spelling of 155653212 in words is "one hundred fifty-five million, six hundred fifty-three thousand, two hundred twelve".