31554541 has 2 divisors, whose sum is σ = 31554542. Its totient is φ = 31554540.

The previous prime is 31554539. The next prime is 31554569. The reversal of 31554541 is 14545513.

It is an a-pointer prime, because the next prime (31554569) can be obtained adding 31554541 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22524516 + 9030025 = 4746^2 + 3005^2 .

It is a cyclic number.

It is not a de Polignac number, because 31554541 - 2¹ = 31554539 is a prime.

Together with 31554539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31554511) 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 as a sum of consecutive naturals, namely, 15777270 + 15777271.

It is an arithmetic number, because the mean of its divisors is an integer number (15777271).

Almost surely, 2^31554541 is an apocalyptic number.

It is an amenable number.

31554541 is a deficient number, since it is larger than the sum of its proper divisors (1).

31554541 is an equidigital number, since it uses as much as digits as its factorization.

31554541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 28.

The square root of 31554541 is about 5617.3428771974. The cubic root of 31554541 is about 316.0001502162. Note that the first 3 decimals are identical.

Subtracting from 31554541 its reverse (14545513), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 31554541 in words is "thirty-one million, five hundred fifty-four thousand, five hundred forty-one".