31401403100 has 72 divisors (see below), whose sum is σ = 69368716368. Its totient is φ = 12334924800.

The previous prime is 31401403091. The next prime is 31401403123. The reversal of 31401403100 is 130410413.

It is a super-2 number, since 2×31401403100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4162532 + ... + 4170068.

It is an arithmetic number, because the mean of its divisors is an integer number (963454394).

Almost surely, 2^31401403100 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 31401403100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34684358184).

31401403100 is an abundant number, since it is smaller than the sum of its proper divisors (37967313268).

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

31401403100 is a wasteful number, since it uses less digits than its factorization.

31401403100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8295 (or 8288 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31401403100 its reverse (130410413), we get a palindrome (31531813513).

The spelling of 31401403100 in words is "thirty-one billion, four hundred one million, four hundred three thousand, one hundred".