Search a number
-
+
31069293 = 310356431
BaseRepresentation
bin111011010000…
…1010001101101
32011110111001120
41312201101231
530423204133
63025531153
7525041013
oct166412155
964414046
1031069293
11165a0902
12a4a3ab9
13658a8c8
1441aa8b3
152adaab3
hex1da146d

31069293 has 4 divisors (see below), whose sum is σ = 41425728. Its totient is φ = 20712860.

The previous prime is 31069279. The next prime is 31069309. The reversal of 31069293 is 39296013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39296013 = 313098671.

It is a cyclic number.

It is not a de Polignac number, because 31069293 - 25 = 31069261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31069253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5178213 + ... + 5178218.

It is an arithmetic number, because the mean of its divisors is an integer number (10356432).

Almost surely, 231069293 is an apocalyptic number.

It is an amenable number.

31069293 is a deficient number, since it is larger than the sum of its proper divisors (10356435).

31069293 is a wasteful number, since it uses less digits than its factorization.

31069293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10356434.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 31069293 is about 5573.9835844753. The cubic root of 31069293 is about 314.3719509419.

The spelling of 31069293 in words is "thirty-one million, sixty-nine thousand, two hundred ninety-three".

Divisors: 1 3 10356431 31069293