31421520223 has 16 divisors (see below), whose sum is σ = 33577479936. Its totient is φ = 29300469120.

The previous prime is 31421520203. The next prime is 31421520227. The reversal of 31421520223 is 32202512413.

It is a cyclic number.

It is not a de Polignac number, because 31421520223 - 2⁵ = 31421520191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421520227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1420990 + ... + 1442932.

It is an arithmetic number, because the mean of its divisors is an integer number (2098592496).

Almost surely, 2^31421520223 is an apocalyptic number.

31421520223 is a deficient number, since it is larger than the sum of its proper divisors (2155959713).

31421520223 is a wasteful number, since it uses less digits than its factorization.

31421520223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22734.

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 31421520223 in words is "thirty-one billion, four hundred twenty-one million, five hundred twenty thousand, two hundred twenty-three".