156172133 has 8 divisors (see below), whose sum is σ = 168452088. Its totient is φ = 143930304.

The previous prime is 156172111. The next prime is 156172147. The reversal of 156172133 is 331271651.

It can be written as a sum of positive squares in 4 ways, for example, as 13082689 + 143089444 = 3617^2 + 11962^2 .

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 156172133 - 2⁶ = 156172069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156172096 and 156172105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156172193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710 + ... + 17687.

It is an arithmetic number, because the mean of its divisors is an integer number (21056511).

Almost surely, 2^156172133 is an apocalyptic number.

156172133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

156172133 is a deficient number, since it is larger than the sum of its proper divisors (12279955).

156172133 is a wasteful number, since it uses less digits than its factorization.

156172133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19063.

The product of its digits is 3780, while the sum is 29.

The square root of 156172133 is about 12496.8849318540. The cubic root of 156172133 is about 538.5191859793.

The spelling of 156172133 in words is "one hundred fifty-six million, one hundred seventy-two thousand, one hundred thirty-three".