31228486 has 4 divisors (see below), whose sum is σ = 46842732. Its totient is φ = 15614242.

The previous prime is 31228469. The next prime is 31228537. The reversal of 31228486 is 68482213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68482213 = 19 ⋅3604327.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7807120 + ... + 7807123.

It is an arithmetic number, because the mean of its divisors is an integer number (11710683).

Almost surely, 2^31228486 is an apocalyptic number.

31228486 is a deficient number, since it is larger than the sum of its proper divisors (15614246).

31228486 is a wasteful number, since it uses less digits than its factorization.

31228486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15614245.

The product of its digits is 18432, while the sum is 34.

The square root of 31228486 is about 5588.2453417866. The cubic root of 31228486 is about 314.9079633692.

The spelling of 31228486 in words is "thirty-one million, two hundred twenty-eight thousand, four hundred eighty-six".