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23312142 = 2327226431
BaseRepresentation
bin101100011101…
…1011100001110
31121212101020200
41120323130032
521431442032
62151354330
7402102300
oct130733416
947771220
1023312142
1112182837
1279829a6
134aa2b89
14314b970
1520a747c
hex163b70e

23312142 has 36 divisors (see below), whose sum is σ = 58758336. Its totient is φ = 6660360.

The previous prime is 23312131. The next prime is 23312147. The reversal of 23312142 is 24121332.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23312147) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12334 + ... + 14097.

It is an arithmetic number, because the mean of its divisors is an integer number (1632176).

Almost surely, 223312142 is an apocalyptic number.

23312142 is an abundant number, since it is smaller than the sum of its proper divisors (35446194).

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

23312142 is a wasteful number, since it uses less digits than its factorization.

23312142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26453 (or 26443 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 23312142 is about 4828.2649057399. The cubic root of 23312142 is about 285.6674292923.

Adding to 23312142 its reverse (24121332), we get a palindrome (47433474).

The spelling of 23312142 in words is "twenty-three million, three hundred twelve thousand, one hundred forty-two".

Divisors: 1 2 3 6 7 9 14 18 21 42 49 63 98 126 147 294 441 882 26431 52862 79293 158586 185017 237879 370034 475758 555051 1110102 1295119 1665153 2590238 3330306 3885357 7770714 11656071 23312142