157639201 has 4 divisors (see below), whose sum is σ = 157686804. Its totient is φ = 157591600.

The previous prime is 157639199. The next prime is 157639211. The reversal of 157639201 is 102936751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102936751 = 17 ⋅6055103.

It can be written as a sum of positive squares in 2 ways, for example, as 106502400 + 51136801 = 10320^2 + 7151^2 .

It is a cyclic number.

It is not a de Polignac number, because 157639201 - 2¹ = 157639199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157639211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18430 + ... + 25591.

It is an arithmetic number, because the mean of its divisors is an integer number (39421701).

Almost surely, 2^157639201 is an apocalyptic number.

It is an amenable number.

157639201 is a deficient number, since it is larger than the sum of its proper divisors (47603).

157639201 is an equidigital number, since it uses as much as digits as its factorization.

157639201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47602.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 157639201 is about 12555.4450737519. The cubic root of 157639201 is about 540.2002012591.

It can be divided in two parts, 15763 and 9201, that added together give a square (24964 = 158²).

The spelling of 157639201 in words is "one hundred fifty-seven million, six hundred thirty-nine thousand, two hundred one".