100201531 has 4 divisors (see below), whose sum is σ = 100411200. Its totient is φ = 99991864.

The previous prime is 100201523. The next prime is 100201559. The reversal of 100201531 is 135102001.

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

It is a cyclic number.

It is not a de Polignac number, because 100201531 - 2³ = 100201523 is a prime.

It is a super-2 number, since 2×100201531² = 20080693629487922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100201511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104116 + ... + 105073.

It is an arithmetic number, because the mean of its divisors is an integer number (25102800).

Almost surely, 2^100201531 is an apocalyptic number.

100201531 is a deficient number, since it is larger than the sum of its proper divisors (209669).

100201531 is an equidigital number, since it uses as much as digits as its factorization.

100201531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209668.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 100201531 is about 10010.0714782663. The cubic root of 100201531 is about 464.4704821453.

Adding to 100201531 its reverse (135102001), we get a palindrome (235303532).

The spelling of 100201531 in words is "one hundred million, two hundred one thousand, five hundred thirty-one".