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331442 = 2165721
BaseRepresentation
bin1010000111010110010
3121211122122
41100322302
541101232
611034242
72550206
oct1207262
9554578
10331442
11207021
1213b982
13b7b27
1488b06
1568312
hex50eb2

331442 has 4 divisors (see below), whose sum is σ = 497166. Its totient is φ = 165720.

The previous prime is 331423. The next prime is 331447. The reversal of 331442 is 244133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244133 = 2411013.

It can be written as a sum of positive squares in only one way, i.e., 259081 + 72361 = 509^2 + 269^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 331442.

It is not an unprimeable number, because it can be changed into a prime (331447) by changing a digit.

331442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82859 + ... + 82862.

2331442 is an apocalyptic number.

331442 is a deficient number, since it is larger than the sum of its proper divisors (165724).

331442 is a wasteful number, since it uses less digits than its factorization.

331442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165723.

The product of its digits is 288, while the sum is 17.

The square root of 331442 is about 575.7099964392. The cubic root of 331442 is about 69.2047408961.

Adding to 331442 its reverse (244133), we get a palindrome (575575).

It can be divided in two parts, 33 and 1442, that multiplied together give a triangular number (47586 = T308).

The spelling of 331442 in words is "three hundred thirty-one thousand, four hundred forty-two".

Divisors: 1 2 165721 331442