311221034 has 4 divisors (see below), whose sum is σ = 466831554. Its totient is φ = 155610516.

The previous prime is 311221019. The next prime is 311221039. The reversal of 311221034 is 430122113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 430122113 = 29 ⋅14831797.

It can be written as a sum of positive squares in only one way, i.e., 295736809 + 15484225 = 17197^2 + 3935^2 .

It is not an unprimeable number, because it can be changed into a prime (311221039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77805257 + ... + 77805260.

Almost surely, 2^311221034 is an apocalyptic number.

311221034 is a deficient number, since it is larger than the sum of its proper divisors (155610520).

311221034 is a wasteful number, since it uses less digits than its factorization.

311221034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155610519.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 311221034 is about 17641.4578195794. The cubic root of 311221034 is about 677.6773655442.

Adding to 311221034 its reverse (430122113), we get a palindrome (741343147).

The spelling of 311221034 in words is "three hundred eleven million, two hundred twenty-one thousand, thirty-four".