201142631 has 2 divisors, whose sum is σ = 201142632. Its totient is φ = 201142630.

The previous prime is 201142561. The next prime is 201142687. The reversal of 201142631 is 136241102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201142631 is a prime.

It is a super-2 number, since 2×201142631² = 80916716011204322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201142031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100571315 + 100571316.

It is an arithmetic number, because the mean of its divisors is an integer number (100571316).

Almost surely, 2^201142631 is an apocalyptic number.

201142631 is a deficient number, since it is larger than the sum of its proper divisors (1).

201142631 is an equidigital number, since it uses as much as digits as its factorization.

201142631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 201142631 is about 14182.4761942335. The cubic root of 201142631 is about 585.9151245562.

Adding to 201142631 its reverse (136241102), we get a palindrome (337383733).

The spelling of 201142631 in words is "two hundred one million, one hundred forty-two thousand, six hundred thirty-one".