2131541 has 2 divisors, whose sum is σ = 2131542. Its totient is φ = 2131540.

The previous prime is 2131537. The next prime is 2131559. The reversal of 2131541 is 1451312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1575025 + 556516 = 1255^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131541 - 2² = 2131537 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065770 + 1065771.

It is an arithmetic number, because the mean of its divisors is an integer number (1065771).

2^2131541 is an apocalyptic number.

It is an amenable number.

2131541 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131541 is an equidigital number, since it uses as much as digits as its factorization.

2131541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 17.

The square root of 2131541 is about 1459.9797943807. The cubic root of 2131541 is about 128.6958562046.

Adding to 2131541 its reverse (1451312), we get a palindrome (3582853).

The spelling of 2131541 in words is "two million, one hundred thirty-one thousand, five hundred forty-one".