Search a number
-
+
31420365 = 352094691
BaseRepresentation
bin111011111011…
…0111111001101
32012010022122020
41313312333031
531020422430
63041240353
7531032364
oct167667715
965108566
1031420365
1116810649
12a6330b9
136681642
14425c7db
152b59b10
hex1df6fcd

31420365 has 8 divisors (see below), whose sum is σ = 50272608. Its totient is φ = 16757520.

The previous prime is 31420343. The next prime is 31420379. The reversal of 31420365 is 56302413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31420365 - 219 = 30896077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047331 + ... + 1047360.

It is an arithmetic number, because the mean of its divisors is an integer number (6284076).

Almost surely, 231420365 is an apocalyptic number.

It is an amenable number.

31420365 is a deficient number, since it is larger than the sum of its proper divisors (18852243).

31420365 is a wasteful number, since it uses less digits than its factorization.

31420365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094699.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 31420365 is about 5605.3871409565. The cubic root of 31420365 is about 315.5516159818.

Adding to 31420365 its reverse (56302413), we get a palindrome (87722778).

The spelling of 31420365 in words is "thirty-one million, four hundred twenty thousand, three hundred sixty-five".

Divisors: 1 3 5 15 2094691 6284073 10473455 31420365