311420252 has 48 divisors (see below), whose sum is σ = 642194784. Its totient is φ = 130272000.

The previous prime is 311420251. The next prime is 311420267. The reversal of 311420252 is 252024113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311420251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263102 + ... + 264282.

It is an arithmetic number, because the mean of its divisors is an integer number (13379058).

Almost surely, 2^311420252 is an apocalyptic number.

It is an amenable number.

311420252 is an abundant number, since it is smaller than the sum of its proper divisors (330774532).

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

311420252 is a wasteful number, since it uses less digits than its factorization.

311420252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670 (or 1668 counting only the distinct ones).

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

The square root of 311420252 is about 17647.1032183755. The cubic root of 311420252 is about 677.8219323937.

Adding to 311420252 its reverse (252024113), we get a palindrome (563444365).

The spelling of 311420252 in words is "three hundred eleven million, four hundred twenty thousand, two hundred fifty-two".