31144541 has 2 divisors, whose sum is σ = 31144542. Its totient is φ = 31144540.

The previous prime is 31144537. The next prime is 31144559. The reversal of 31144541 is 14544113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30415225 + 729316 = 5515^2 + 854^2 .

It is a cyclic number.

It is not a de Polignac number, because 31144541 - 2² = 31144537 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31144511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572270 + 15572271.

It is an arithmetic number, because the mean of its divisors is an integer number (15572271).

Almost surely, 2^31144541 is an apocalyptic number.

It is an amenable number.

31144541 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144541 is an equidigital number, since it uses as much as digits as its factorization.

31144541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 31144541 is about 5580.7294326100. The cubic root of 31144541 is about 314.6255431142.

Adding to 31144541 its reverse (14544113), we get a palindrome (45688654).

The spelling of 31144541 in words is "thirty-one million, one hundred forty-four thousand, five hundred forty-one".