155715 has 16 divisors (see below), whose sum is σ = 284928. Its totient is φ = 71136.

The previous prime is 155707. The next prime is 155717. The reversal of 155715 is 517551.

It is not a de Polignac number, because 155715 - 2³ = 155707 is a prime.

It is a super-2 number, since 2×155715² = 48494322450, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155715.

It is not an unprimeable number, because it can be changed into a prime (155717) 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, 637 + ... + 846.

It is an arithmetic number, because the mean of its divisors is an integer number (17808).

2¹⁵⁵⁷¹⁵ is an apocalyptic number.

155715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155715 is a deficient number, since it is larger than the sum of its proper divisors (129213).

155715 is a wasteful number, since it uses less digits than its factorization.

155715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498.

The product of its digits is 875, while the sum is 24.

The square root of 155715 is about 394.6073998292. The cubic root of 155715 is about 53.7993237525.

It can be divided in two parts, 15571 and 5, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 155715 in words is "one hundred fifty-five thousand, seven hundred fifteen".