311222130 has 16 divisors (see below), whose sum is σ = 746933184. Its totient is φ = 82992560.

The previous prime is 311222101. The next prime is 311222137. The reversal of 311222130 is 31222113.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (311222137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5187006 + ... + 5187065.

It is an arithmetic number, because the mean of its divisors is an integer number (46683324).

Almost surely, 2^311222130 is an apocalyptic number.

311222130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

311222130 is an abundant number, since it is smaller than the sum of its proper divisors (435711054).

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

311222130 is a wasteful number, since it uses less digits than its factorization.

311222130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374081.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 311222130 is about 17641.4888827446. The cubic root of 311222130 is about 677.6781610490.

Adding to 311222130 its reverse (31222113), we get a palindrome (342444243).

The spelling of 311222130 in words is "three hundred eleven million, two hundred twenty-two thousand, one hundred thirty".