155652217 has 16 divisors (see below), whose sum is σ = 183094912. Its totient is φ = 129548160.

The previous prime is 155652191. The next prime is 155652223. The reversal of 155652217 is 712256551.

It is not a de Polignac number, because 155652217 - 2¹¹ = 155650169 is a prime.

It is a super-2 number, since 2×155652217² = 48455225314030178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155652227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53053 + ... + 55909.

It is an arithmetic number, because the mean of its divisors is an integer number (11443432).

Almost surely, 2^155652217 is an apocalyptic number.

It is an amenable number.

155652217 is a deficient number, since it is larger than the sum of its proper divisors (27442695).

155652217 is a wasteful number, since it uses less digits than its factorization.

155652217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088.

The product of its digits is 21000, while the sum is 34.

The square root of 155652217 is about 12476.0657660979. The cubic root of 155652217 is about 537.9209229970.

The spelling of 155652217 in words is "one hundred fifty-five million, six hundred fifty-two thousand, two hundred seventeen".