31126906 has 4 divisors (see below), whose sum is σ = 46690362. Its totient is φ = 15563452.

The previous prime is 31126903. The next prime is 31126919. The reversal of 31126906 is 60962113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60962113 = 659 ⋅92507.

It can be written as a sum of positive squares in only one way, i.e., 28998225 + 2128681 = 5385^2 + 1459^2 .

It is not an unprimeable number, because it can be changed into a prime (31126903) 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 as a sum of consecutive naturals, namely, 7781725 + ... + 7781728.

Almost surely, 2^31126906 is an apocalyptic number.

31126906 is a deficient number, since it is larger than the sum of its proper divisors (15563456).

31126906 is a wasteful number, since it uses less digits than its factorization.

31126906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15563455.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 31126906 is about 5579.1492182948. The cubic root of 31126906 is about 314.5661483393.

The spelling of 31126906 in words is "thirty-one million, one hundred twenty-six thousand, nine hundred six".