3631181 has 2 divisors, whose sum is σ = 3631182. Its totient is φ = 3631180.

The previous prime is 3631169. The next prime is 3631211. The reversal of 3631181 is 1811363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2775556 + 855625 = 1666^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 3631181 - 2¹⁰ = 3630157 is a prime.

It is a super-2 number, since 2×3631181² = 26370950909522, 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 (3631141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1815590 + 1815591.

It is an arithmetic number, because the mean of its divisors is an integer number (1815591).

Almost surely, 2^3631181 is an apocalyptic number.

It is an amenable number.

3631181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3631181 is an equidigital number, since it uses as much as digits as its factorization.

3631181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 3631181 is about 1905.5657952430. The cubic root of 3631181 is about 153.7031020071.

The spelling of 3631181 in words is "three million, six hundred thirty-one thousand, one hundred eighty-one".