155117252 has 6 divisors (see below), whose sum is σ = 271455198. Its totient is φ = 77558624.

The previous prime is 155117243. The next prime is 155117269. The reversal of 155117252 is 252711551.

It can be written as a sum of positive squares in only one way, i.e., 113720896 + 41396356 = 10664^2 + 6434^2 .

It is a super-2 number, since 2×155117252² = 48122723736063008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19389653 + ... + 19389660.

It is an arithmetic number, because the mean of its divisors is an integer number (45242533).

Almost surely, 2^155117252 is an apocalyptic number.

It is an amenable number.

155117252 is a deficient number, since it is larger than the sum of its proper divisors (116337946).

155117252 is a wasteful number, since it uses less digits than its factorization.

155117252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38779317 (or 38779315 counting only the distinct ones).

The product of its digits is 3500, while the sum is 29.

The square root of 155117252 is about 12454.6076614239. The cubic root of 155117252 is about 537.3039510000.

The spelling of 155117252 in words is "one hundred fifty-five million, one hundred seventeen thousand, two hundred fifty-two".