31423411220 has 24 divisors (see below), whose sum is σ = 66107659464. Its totient is φ = 12546793856.

The previous prime is 31423411189. The next prime is 31423411223. The reversal of 31423411220 is 2211432413.

It can be written as a sum of positive squares in 4 ways, for example, as 2082461956 + 29340949264 = 45634^2 + 171292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423411223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399247 + ... + 1421526.

It is an arithmetic number, because the mean of its divisors is an integer number (2754485811).

Almost surely, 2^31423411220 is an apocalyptic number.

It is an amenable number.

31423411220 is an abundant number, since it is smaller than the sum of its proper divisors (34684248244).

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

31423411220 is a wasteful number, since it uses less digits than its factorization.

31423411220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821339 (or 2821337 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31423411220 its reverse (2211432413), we get a palindrome (33634843633).

The spelling of 31423411220 in words is "thirty-one billion, four hundred twenty-three million, four hundred eleven thousand, two hundred twenty".