31241623009 has 3 divisors (see below), whose sum is σ = 31241799763. Its totient is φ = 31241446256.

The previous prime is 31241623003. The next prime is 31241623033. The reversal of 31241623009 is 90032614213.

The square root of 31241623009 is 176753.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90032614213 = 1031 ⋅87325523.

It can be written as a sum of positive squares in only one way, i.e., 1475712225 + 29765910784 = 38415^2 + 172528^2 .

It is not a de Polignac number, because 31241623009 - 2⁵ = 31241622977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31241623003) 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 in 2 ways as a sum of consecutive naturals, for example, 88377 + ... + 265129.

Almost surely, 2^31241623009 is an apocalyptic number.

31241623009 is the 176753-rd square number.

31241623009 is the 88377-th centered octagonal number.

It is an amenable number.

31241623009 is a deficient number, since it is larger than the sum of its proper divisors (176754).

31241623009 is an frugal number, since it uses more digits than its factorization.

31241623009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353506 (or 176753 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 31241623009 in words is "thirty-one billion, two hundred forty-one million, six hundred twenty-three thousand, nine".