31425320011 has 4 divisors (see below), whose sum is σ = 31867930224. Its totient is φ = 30982709800.

The previous prime is 31425319997. The next prime is 31425320033. The reversal of 31425320011 is 11002352413.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31425320011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31425320081) 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, 221305000 + ... + 221305141.

It is an arithmetic number, because the mean of its divisors is an integer number (7966982556).

Almost surely, 2^31425320011 is an apocalyptic number.

31425320011 is a deficient number, since it is larger than the sum of its proper divisors (442610213).

31425320011 is an equidigital number, since it uses as much as digits as its factorization.

31425320011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442610212.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 31425320011 its reverse (11002352413), we get a palindrome (42427672424).

The spelling of 31425320011 in words is "thirty-one billion, four hundred twenty-five million, three hundred twenty thousand, eleven".