31226745 has 16 divisors (see below), whose sum is σ = 54505152. Its totient is φ = 15140160.

The previous prime is 31226737. The next prime is 31226749. The reversal of 31226745 is 54762213.

It is not a de Polignac number, because 31226745 - 2³ = 31226737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31226749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94462 + ... + 94791.

It is an arithmetic number, because the mean of its divisors is an integer number (3406572).

Almost surely, 2^31226745 is an apocalyptic number.

It is an amenable number.

31226745 is a deficient number, since it is larger than the sum of its proper divisors (23278407).

31226745 is a wasteful number, since it uses less digits than its factorization.

31226745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189272.

The product of its digits is 10080, while the sum is 30.

The square root of 31226745 is about 5588.0895662113. The cubic root of 31226745 is about 314.9021111808.

Adding to 31226745 its reverse (54762213), we get a palindrome (85988958).

The spelling of 31226745 in words is "thirty-one million, two hundred twenty-six thousand, seven hundred forty-five".