156542201 has 2 divisors, whose sum is σ = 156542202. Its totient is φ = 156542200.

The previous prime is 156542179. The next prime is 156542207. The reversal of 156542201 is 102245651.

156542201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115004176 + 41538025 = 10724^2 + 6445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156542201 is a prime.

It is a super-5 number, since 5×156542201⁵ (a number of 42 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (156542207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78271100 + 78271101.

It is an arithmetic number, because the mean of its divisors is an integer number (78271101).

Almost surely, 2^156542201 is an apocalyptic number.

It is an amenable number.

156542201 is a deficient number, since it is larger than the sum of its proper divisors (1).

156542201 is an equidigital number, since it uses as much as digits as its factorization.

156542201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 156542201 is about 12511.6825806923. The cubic root of 156542201 is about 538.9442116835.

Adding to 156542201 its reverse (102245651), we get a palindrome (258787852).

The spelling of 156542201 in words is "one hundred fifty-six million, five hundred forty-two thousand, two hundred one".