31401111000 has 192 divisors, whose sum is σ = 113967341280. Its totient is φ = 7177363200.

The previous prime is 31401110987. The next prime is 31401111013. The reversal of 31401111000 is 11110413.

It is an interprime number because it is at equal distance from previous prime (31401110987) and next prime (31401111013).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40194 + ... + 253806.

Almost surely, 2^31401111000 is an apocalyptic number.

31401111000 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 31401111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56983670640).

31401111000 is an abundant number, since it is smaller than the sum of its proper divisors (82566230280).

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

31401111000 is a wasteful number, since it uses less digits than its factorization.

31401111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213651 (or 213630 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 31401111000 its reverse (11110413), we get a palindrome (31412221413).

The spelling of 31401111000 in words is "thirty-one billion, four hundred one million, one hundred eleven thousand".