201580642 has 4 divisors (see below), whose sum is σ = 302370966. Its totient is φ = 100790320.

The previous prime is 201580609. The next prime is 201580651. The reversal of 201580642 is 246085102.

201580642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 83010321 = 10889^2 + 9111^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201580642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50395159 + ... + 50395162.

Almost surely, 2^201580642 is an apocalyptic number.

201580642 is a deficient number, since it is larger than the sum of its proper divisors (100790324).

201580642 is a wasteful number, since it uses less digits than its factorization.

201580642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100790323.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 201580642 is about 14197.9097757381. The cubic root of 201580642 is about 586.3401152004.

The spelling of 201580642 in words is "two hundred one million, five hundred eighty thousand, six hundred forty-two".