31159663441 has 3 divisors (see below), whose sum is σ = 31159839963. Its totient is φ = 31159486920.

The previous prime is 31159663439. The next prime is 31159663481. The reversal of 31159663441 is 14436695113.

The square root of 31159663441 is 176521.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 31074285841 + 85377600 = 176279^2 + 9240^2 .

It is not a de Polignac number, because 31159663441 - 2¹ = 31159663439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31159663411) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 88261 + ... + 264781.

It is an arithmetic number, because the mean of its divisors is an integer number (10386613321).

Almost surely, 2^31159663441 is an apocalyptic number.

31159663441 is the 176521-st square number.

31159663441 is the 88261-st centered octagonal number.

It is an amenable number.

31159663441 is a deficient number, since it is larger than the sum of its proper divisors (176522).

31159663441 is an frugal number, since it uses more digits than its factorization.

31159663441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353042 (or 176521 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The spelling of 31159663441 in words is "thirty-one billion, one hundred fifty-nine million, six hundred sixty-three thousand, four hundred forty-one".