156945213 has 12 divisors (see below), whose sum is σ = 228944508. Its totient is φ = 103593600.

The previous prime is 156945209. The next prime is 156945221. The reversal of 156945213 is 312549651.

It can be written as a sum of positive squares in 2 ways, for example, as 135070884 + 21874329 = 11622^2 + 4677^2 .

It is not a de Polignac number, because 156945213 - 2² = 156945209 is a prime.

It is a super-3 number, since 3×156945213³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156945293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85420 + ... + 87237.

It is an arithmetic number, because the mean of its divisors is an integer number (19078709).

Almost surely, 2^156945213 is an apocalyptic number.

It is an amenable number.

156945213 is a deficient number, since it is larger than the sum of its proper divisors (71999295).

156945213 is a wasteful number, since it uses less digits than its factorization.

156945213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172764 (or 172761 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 156945213 is about 12527.7776560729. Note that the first 3 decimals coincide. The cubic root of 156945213 is about 539.4063125472.

The spelling of 156945213 in words is "one hundred fifty-six million, nine hundred forty-five thousand, two hundred thirteen".