311323153 has 2 divisors, whose sum is σ = 311323154. Its totient is φ = 311323152.

The previous prime is 311323141. The next prime is 311323171. The reversal of 311323153 is 351323113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253987969 + 57335184 = 15937^2 + 7572^2 .

It is a cyclic number.

It is not a de Polignac number, because 311323153 - 2¹³ = 311314961 is a prime.

It is a super-2 number, since 2×311323153² = 193844211187722818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311329153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155661576 + 155661577.

It is an arithmetic number, because the mean of its divisors is an integer number (155661577).

Almost surely, 2^311323153 is an apocalyptic number.

It is an amenable number.

311323153 is a deficient number, since it is larger than the sum of its proper divisors (1).

311323153 is an equidigital number, since it uses as much as digits as its factorization.

311323153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 22.

The square root of 311323153 is about 17644.3518724832. The cubic root of 311323153 is about 677.7514781090.

Adding to 311323153 its reverse (351323113), we get a palindrome (662646266).

The spelling of 311323153 in words is "three hundred eleven million, three hundred twenty-three thousand, one hundred fifty-three".