31130426 has 4 divisors (see below), whose sum is σ = 46695642. Its totient is φ = 15565212.

The previous prime is 31130423. The next prime is 31130441. The reversal of 31130426 is 62403113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62403113 = 1823 ⋅34231.

It can be written as a sum of positive squares in only one way, i.e., 21613201 + 9517225 = 4649^2 + 3085^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31130398 and 31130407.

It is not an unprimeable number, because it can be changed into a prime (31130423) 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, 7782605 + ... + 7782608.

Almost surely, 2^31130426 is an apocalyptic number.

31130426 is a deficient number, since it is larger than the sum of its proper divisors (15565216).

31130426 is a wasteful number, since it uses less digits than its factorization.

31130426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565215.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 31130426 is about 5579.4646696614. The cubic root of 31130426 is about 314.5780055099.

Adding to 31130426 its reverse (62403113), we get a palindrome (93533539).

The spelling of 31130426 in words is "thirty-one million, one hundred thirty thousand, four hundred twenty-six".