31824925009 has 4 divisors (see below), whose sum is σ = 31837551460. Its totient is φ = 31812298560.

The previous prime is 31824924949. The next prime is 31824925019. The reversal of 31824925009 is 90052942813.

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 15599260609 + 16225664400 = 124897^2 + 127380^2 .

It is a cyclic number.

It is not a de Polignac number, because 31824925009 - 2⁹ = 31824924497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31824925019) 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, 6309444 + ... + 6314485.

It is an arithmetic number, because the mean of its divisors is an integer number (7959387865).

Almost surely, 2^31824925009 is an apocalyptic number.

It is an amenable number.

31824925009 is a deficient number, since it is larger than the sum of its proper divisors (12626451).

31824925009 is a wasteful number, since it uses less digits than its factorization.

31824925009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12626450.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 31824925009 in words is "thirty-one billion, eight hundred twenty-four million, nine hundred twenty-five thousand, nine".