311243148 has 36 divisors (see below), whose sum is σ = 815895080. Its totient is φ = 103747392.

The previous prime is 311243143. The next prime is 311243209. The reversal of 311243148 is 841342113.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (311243143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159133 + ... + 161076.

Almost surely, 2^311243148 is an apocalyptic number.

It is an amenable number.

311243148 is an abundant number, since it is smaller than the sum of its proper divisors (504651932).

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

311243148 is a wasteful number, since it uses less digits than its factorization.

311243148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320228 (or 320214 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 311243148 is about 17642.0845707076. The cubic root of 311243148 is about 677.6934160899.

The spelling of 311243148 in words is "three hundred eleven million, two hundred forty-three thousand, one hundred forty-eight".