31241145541 has 4 divisors (see below), whose sum is σ = 31241576800. Its totient is φ = 31240714284.

The previous prime is 31241145527. The next prime is 31241145557. The reversal of 31241145541 is 14554114213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14554114213 = 107 ⋅136019759.

It is a cyclic number.

It is not a de Polignac number, because 31241145541 - 2¹⁹ = 31240621253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31241145041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77451 + ... + 261688.

It is an arithmetic number, because the mean of its divisors is an integer number (7810394200).

Almost surely, 2^31241145541 is an apocalyptic number.

It is an amenable number.

31241145541 is a deficient number, since it is larger than the sum of its proper divisors (431259).

31241145541 is an equidigital number, since it uses as much as digits as its factorization.

31241145541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431258.

The product of its digits is 9600, while the sum is 31.

Adding to 31241145541 its reverse (14554114213), we get a palindrome (45795259754).

The spelling of 31241145541 in words is "thirty-one billion, two hundred forty-one million, one hundred forty-five thousand, five hundred forty-one".