311225240000 has 280 divisors, whose sum is σ = 787941528000. Its totient is φ = 121904640000.

The previous prime is 311225239987. The next prime is 311225240057. The reversal of 311225240000 is 42522113.

It is a super-2 number, since 2×311225240000² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 470839670 + ... + 470840330.

Almost surely, 2^311225240000 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 311225240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393970764000).

311225240000 is an abundant number, since it is smaller than the sum of its proper divisors (476716288000).

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

311225240000 is an equidigital number, since it uses as much as digits as its factorization.

311225240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 896 counting only the distinct ones).

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

Adding to 311225240000 its reverse (42522113), we get a palindrome (311267762113).

The spelling of 311225240000 in words is "three hundred eleven billion, two hundred twenty-five million, two hundred forty thousand".