31220400010 has 16 divisors (see below), whose sum is σ = 57392395776. Its totient is φ = 12222454288.

The previous prime is 31220399999. The next prime is 31220400019. The reversal of 31220400010 is 1000402213.

It is not an unprimeable number, because it can be changed into a prime (31220400019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33212722 + ... + 33213661.

It is an arithmetic number, because the mean of its divisors is an integer number (3587024736).

Almost surely, 2^31220400010 is an apocalyptic number.

31220400010 is a deficient number, since it is larger than the sum of its proper divisors (26171995766).

31220400010 is a wasteful number, since it uses less digits than its factorization.

31220400010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66426437.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 31220400010 its reverse (1000402213), we get a palindrome (32220802223).

The spelling of 31220400010 in words is "thirty-one billion, two hundred twenty million, four hundred thousand, ten".