31126664 has 8 divisors (see below), whose sum is σ = 58362510. Its totient is φ = 15563328.

The previous prime is 31126661. The next prime is 31126681. The reversal of 31126664 is 46662113.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27478564 + 3648100 = 5242^2 + 1910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (31126661) 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 as a sum of consecutive naturals, namely, 1945409 + ... + 1945424.

Almost surely, 2^31126664 is an apocalyptic number.

It is an amenable number.

31126664 is a deficient number, since it is larger than the sum of its proper divisors (27235846).

31126664 is a wasteful number, since it uses less digits than its factorization.

31126664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890839 (or 3890835 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 31126664 is about 5579.1275303581. The cubic root of 31126664 is about 314.5653331260.

Adding to 31126664 its reverse (46662113), we get a palindrome (77788777).

The spelling of 31126664 in words is "thirty-one million, one hundred twenty-six thousand, six hundred sixty-four".