156493281 has 16 divisors (see below), whose sum is σ = 238647168. Its totient is φ = 89356800.

The previous prime is 156493261. The next prime is 156493283. The reversal of 156493281 is 182394651.

It is not a de Polignac number, because 156493281 - 2⁶ = 156493217 is a prime.

It is a super-2 number, since 2×156493281² = 48980293996289922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156493283) 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, 41911 + ... + 45491.

It is an arithmetic number, because the mean of its divisors is an integer number (14915448).

Almost surely, 2^156493281 is an apocalyptic number.

It is an amenable number.

156493281 is a deficient number, since it is larger than the sum of its proper divisors (82153887).

156493281 is a wasteful number, since it uses less digits than its factorization.

156493281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672.

The product of its digits is 51840, while the sum is 39.

The square root of 156493281 is about 12509.7274550647. The cubic root of 156493281 is about 538.8880651672. Note that the first 3 decimals are identical.

The spelling of 156493281 in words is "one hundred fifty-six million, four hundred ninety-three thousand, two hundred eighty-one".