31204148441 has 4 divisors (see below), whose sum is σ = 31222981812. Its totient is φ = 31185315072.

The previous prime is 31204148429. The next prime is 31204148471. The reversal of 31204148441 is 14484140213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7977169225 + 23226979216 = 89315^2 + 152404^2 .

It is a cyclic number.

It is not a de Polignac number, because 31204148441 - 2⁶ = 31204148377 is a prime.

It is a super-3 number, since 3×31204148441³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31204148398 and 31204148407.

It is not an unprimeable number, because it can be changed into a prime (31204148411) 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, 9414200 + ... + 9417513.

It is an arithmetic number, because the mean of its divisors is an integer number (7805745453).

Almost surely, 2^31204148441 is an apocalyptic number.

It is an amenable number.

31204148441 is a deficient number, since it is larger than the sum of its proper divisors (18833371).

31204148441 is a wasteful number, since it uses less digits than its factorization.

31204148441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18833370.

The product of its (nonzero) digits is 12288, while the sum is 32.

Adding to 31204148441 its reverse (14484140213), we get a palindrome (45688288654).

The spelling of 31204148441 in words is "thirty-one billion, two hundred four million, one hundred forty-eight thousand, four hundred forty-one".