31242420022 has 8 divisors (see below), whose sum is σ = 51123960072. Its totient is φ = 14201100000.

The previous prime is 31242419993. The next prime is 31242420023. The reversal of 31242420022 is 22002424213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 1420110001 = 31242420022 / (3 + 1 + 2 + 4 + 2 + 4 + 2 + 0 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 31242419975 and 31242420002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242420023) 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, 710054979 + ... + 710055022.

It is an arithmetic number, because the mean of its divisors is an integer number (6390495009).

Almost surely, 2^31242420022 is an apocalyptic number.

31242420022 is a deficient number, since it is larger than the sum of its proper divisors (19881540050).

31242420022 is a wasteful number, since it uses less digits than its factorization.

31242420022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420110014.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 31242420022 its reverse (22002424213), we get a palindrome (53244844235).

The spelling of 31242420022 in words is "thirty-one billion, two hundred forty-two million, four hundred twenty thousand, twenty-two".