156545225 has 6 divisors (see below), whose sum is σ = 194116110. Its totient is φ = 125236160.

The previous prime is 156545201. The next prime is 156545243. The reversal of 156545225 is 522545651.

It can be written as a sum of positive squares in 3 ways, for example, as 1517824 + 155027401 = 1232^2 + 12451^2 .

It is not a de Polignac number, because 156545225 - 2¹⁸ = 156283081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3130880 + ... + 3130929.

It is an arithmetic number, because the mean of its divisors is an integer number (32352685).

Almost surely, 2^156545225 is an apocalyptic number.

It is an amenable number.

156545225 is a deficient number, since it is larger than the sum of its proper divisors (37570885).

156545225 is an equidigital number, since it uses as much as digits as its factorization.

156545225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6261819 (or 6261814 counting only the distinct ones).

The product of its digits is 60000, while the sum is 35.

The square root of 156545225 is about 12511.8034271643. The cubic root of 156545225 is about 538.9476820082.

The spelling of 156545225 in words is "one hundred fifty-six million, five hundred forty-five thousand, two hundred twenty-five".