31813426 has 8 divisors (see below), whose sum is σ = 50527260. Its totient is φ = 14971008.

The previous prime is 31813423. The next prime is 31813427. The reversal of 31813426 is 62431813.

It can be written as a sum of positive squares in 2 ways, for example, as 31371201 + 442225 = 5601^2 + 665^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31813394 and 31813403.

It is not an unprimeable number, because it can be changed into a prime (31813423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467811 + ... + 467878.

Almost surely, 2^31813426 is an apocalyptic number.

31813426 is a deficient number, since it is larger than the sum of its proper divisors (18713834).

31813426 is a wasteful number, since it uses less digits than its factorization.

31813426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935708.

The product of its digits is 3456, while the sum is 28.

The square root of 31813426 is about 5640.3391741987. The cubic root of 31813426 is about 316.8619911614.

The spelling of 31813426 in words is "thirty-one million, eight hundred thirteen thousand, four hundred twenty-six".