31220422030 has 48 divisors (see below), whose sum is σ = 67138583616. Its totient is φ = 10414837440.

The previous prime is 31220422003. The next prime is 31220422031. The reversal of 31220422030 is 3022402213.

It is a junction number, because it is equal to n+sod(n) for n = 31220421989 and 31220422007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220422031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 842886 + ... + 879145.

It is an arithmetic number, because the mean of its divisors is an integer number (1398720492).

Almost surely, 2^31220422030 is an apocalyptic number.

31220422030 is an abundant number, since it is smaller than the sum of its proper divisors (35918161586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31220422030 is a wasteful number, since it uses less digits than its factorization.

31220422030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722089 (or 1722082 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 31220422030 its reverse (3022402213), we get a palindrome (34242824243).

The spelling of 31220422030 in words is "thirty-one billion, two hundred twenty million, four hundred twenty-two thousand, thirty".