311242134 has 16 divisors (see below), whose sum is σ = 711410688. Its totient is φ = 88926312.

The previous prime is 311242117. The next prime is 311242147. The reversal of 311242134 is 431242113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 311242134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3705222 + ... + 3705305.

It is an arithmetic number, because the mean of its divisors is an integer number (44463168).

Almost surely, 2^311242134 is an apocalyptic number.

311242134 is an abundant number, since it is smaller than the sum of its proper divisors (400168554).

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

311242134 is a wasteful number, since it uses less digits than its factorization.

311242134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7410539.

The product of its digits is 576, while the sum is 21.

The square root of 311242134 is about 17642.0558325837. The cubic root of 311242134 is about 677.6926801360.

Subtracting from 311242134 its sum of digits (21), we obtain a palindrome (311242113).

Adding to 311242134 its reverse (431242113), we get a palindrome (742484247).

The spelling of 311242134 in words is "three hundred eleven million, two hundred forty-two thousand, one hundred thirty-four".