201242222531 has 16 divisors (see below), whose sum is σ = 235638379200. Its totient is φ = 168259230720.

The previous prime is 201242222491. The next prime is 201242222543. The reversal of 201242222531 is 135222242102.

It is a de Polignac number, because none of the positive numbers 2^k-201242222531 is a prime.

It is a super-2 number, since 2×201242222531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201242222531.

It is not an unprimeable number, because it can be changed into a prime (201242222561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851995 + ... + 1957643.

It is an arithmetic number, because the mean of its divisors is an integer number (14727398700).

Almost surely, 2^201242222531 is an apocalyptic number.

201242222531 is a deficient number, since it is larger than the sum of its proper divisors (34396156669).

201242222531 is a wasteful number, since it uses less digits than its factorization.

201242222531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112334.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 201242222531 its reverse (135222242102), we get a palindrome (336464464633).

The spelling of 201242222531 in words is "two hundred one billion, two hundred forty-two million, two hundred twenty-two thousand, five hundred thirty-one".