155996 has 12 divisors (see below), whose sum is σ = 278040. Its totient is φ = 76560.

The previous prime is 155921. The next prime is 156007. The reversal of 155996 is 699551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95 + ... + 566.

It is an arithmetic number, because the mean of its divisors is an integer number (23170).

2¹⁵⁵⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

155996 is a deficient number, since it is larger than the sum of its proper divisors (122044).

155996 is a wasteful number, since it uses less digits than its factorization.

155996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 722 counting only the distinct ones).

The product of its digits is 12150, while the sum is 35.

The square root of 155996 is about 394.9632894333. The cubic root of 155996 is about 53.8316660133.

Subtracting from 155996 its sum of digits (35), we obtain a triangular number (155961 = T₅₅₈).

Multiplying 155996 by its sum of digits (35), we get a triangular number (5459860 = T₃₃₀₄).

The spelling of 155996 in words is "one hundred fifty-five thousand, nine hundred ninety-six".