31228820842 has 16 divisors (see below), whose sum is σ = 47088317952. Its totient is φ = 15532840800.

The previous prime is 31228820797. The next prime is 31228820849. The reversal of 31228820842 is 24802882213.

It is a junction number, because it is equal to n+sod(n) for n = 31228820795 and 31228820804.

It is not an unprimeable number, because it can be changed into a prime (31228820849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475717 + ... + 537367.

It is an arithmetic number, because the mean of its divisors is an integer number (2943019872).

Almost surely, 2^31228820842 is an apocalyptic number.

31228820842 is a deficient number, since it is larger than the sum of its proper divisors (15859497110).

31228820842 is a wasteful number, since it uses less digits than its factorization.

31228820842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62973.

The product of its (nonzero) digits is 98304, while the sum is 40.

The spelling of 31228820842 in words is "thirty-one billion, two hundred twenty-eight million, eight hundred twenty thousand, eight hundred forty-two".