31154420000000 has 1152 divisors, whose sum is σ = 91059966885888. Its totient is φ = 10524800000000.

The previous prime is 31154419999993. The next prime is 31154420000003. The reversal of 31154420000000 is 2445113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31154420000003) 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 127 ways as a sum of consecutive naturals, for example, 237819999935 + ... + 237820000065.

It is an arithmetic number, because the mean of its divisors is an integer number (79045110144).

Almost surely, 2^{31154420000000} 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 31154420000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45529983442944).

31154420000000 is an abundant number, since it is smaller than the sum of its proper divisors (59905546885888).

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

31154420000000 is an frugal number, since it uses more digits than its factorization.

31154420000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 31154420000000 its reverse (2445113), we get a palindrome (31154422445113).

The spelling of 31154420000000 in words is "thirty-one trillion, one hundred fifty-four billion, four hundred twenty million", and thus it is an aban number.