31321426 has 16 divisors (see below), whose sum is σ = 48121920. Its totient is φ = 15284880.

The previous prime is 31321399. The next prime is 31321427. The reversal of 31321426 is 62412313.

It is a junction number, because it is equal to n+sod(n) for n = 31321397 and 31321406.

It is not an unprimeable number, because it can be changed into a prime (31321427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16035 + ... + 17881.

It is an arithmetic number, because the mean of its divisors is an integer number (3007620).

Almost surely, 2^31321426 is an apocalyptic number.

31321426 is a deficient number, since it is larger than the sum of its proper divisors (16800494).

31321426 is a wasteful number, since it uses less digits than its factorization.

31321426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049.

The product of its digits is 864, while the sum is 22.

The square root of 31321426 is about 5596.5548331094. The cubic root of 31321426 is about 315.2200561954.

Adding to 31321426 its reverse (62412313), we get a palindrome (93733739).

The spelling of 31321426 in words is "thirty-one million, three hundred twenty-one thousand, four hundred twenty-six".