155880731 has 8 divisors (see below), whose sum is σ = 164363280. Its totient is φ = 147426048.

The previous prime is 155880721. The next prime is 155880737. The reversal of 155880731 is 137088551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155880731 - 2¹⁰ = 155879707 is a prime.

It is a super-2 number, since 2×155880731² = 48597604594188722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155880737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5075 + ... + 18371.

It is an arithmetic number, because the mean of its divisors is an integer number (20545410).

Almost surely, 2^155880731 is an apocalyptic number.

155880731 is a deficient number, since it is larger than the sum of its proper divisors (8482549).

155880731 is a wasteful number, since it uses less digits than its factorization.

155880731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13933.

The product of its (nonzero) digits is 33600, while the sum is 38.

The square root of 155880731 is about 12485.2205026583. The cubic root of 155880731 is about 538.1840359780.

The spelling of 155880731 in words is "one hundred fifty-five million, eight hundred eighty thousand, seven hundred thirty-one".