31403442000 has 320 divisors, whose sum is σ = 117349060608. Its totient is φ = 7076160000.

The previous prime is 31403441987. The next prime is 31403442017. The reversal of 31403442000 is 24430413.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2976735 + ... + 2987265.

Almost surely, 2^31403442000 is an apocalyptic number.

31403442000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31403442000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58674530304).

31403442000 is an abundant number, since it is smaller than the sum of its proper divisors (85945618608).

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

31403442000 is a wasteful number, since it uses less digits than its factorization.

31403442000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10635 (or 10619 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 31403442000 its reverse (24430413), we get a palindrome (31427872413).

The spelling of 31403442000 in words is "thirty-one billion, four hundred three million, four hundred forty-two thousand".