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23311320313 = 61133813401
BaseRepresentation
bin10101101101011101…
…101000010011111001
32020011121100202202211
4111231131220103321
5340220144222223
614413054255121
71453450644661
oct255535502371
966147322684
1023311320313
1199826a5a86
124626ab74a1
132276721778
1411b1dab1a1
15916807d0d
hex56d7684f9

23311320313 has 4 divisors (see below), whose sum is σ = 23315139828. Its totient is φ = 23307500800.

The previous prime is 23311320269. The next prime is 23311320317. The reversal of 23311320313 is 31302311332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15894149184 + 7417171129 = 126072^2 + 86123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-23311320313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23311320317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1900588 + ... + 1912813.

It is an arithmetic number, because the mean of its divisors is an integer number (5828784957).

Almost surely, 223311320313 is an apocalyptic number.

It is an amenable number.

23311320313 is a deficient number, since it is larger than the sum of its proper divisors (3819515).

23311320313 is an equidigital number, since it uses as much as digits as its factorization.

23311320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819514.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 23311320313 its reverse (31302311332), we get a palindrome (54613631645).

The spelling of 23311320313 in words is "twenty-three billion, three hundred eleven million, three hundred twenty thousand, three hundred thirteen".

Divisors: 1 6113 3813401 23311320313