31423201000 has 128 divisors (see below), whose sum is σ = 75086818560. Its totient is φ = 12305568000.

The previous prime is 31423200997. The next prime is 31423201001. The reversal of 31423201000 is 10232413.

It is a happy number.

It is a super-2 number, since 2×31423201000² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31423201001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11589645 + ... + 11592355.

It is an arithmetic number, because the mean of its divisors is an integer number (586615770).

Almost surely, 2^31423201000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31423201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37543409280).

31423201000 is an abundant number, since it is smaller than the sum of its proper divisors (43663617560).

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

31423201000 is a wasteful number, since it uses less digits than its factorization.

31423201000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972 (or 2958 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31423201000 its reverse (10232413), we get a palindrome (31433433413).

The spelling of 31423201000 in words is "thirty-one billion, four hundred twenty-three million, two hundred one thousand".