31145026 has 16 divisors (see below), whose sum is σ = 51928128. Its totient is φ = 13889200.

The previous prime is 31145011. The next prime is 31145027. The reversal of 31145026 is 62054113.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 31144988 and 31145006.

It is not an unprimeable number, because it can be changed into a prime (31145027) 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 in 7 ways as a sum of consecutive naturals, for example, 12190 + ... + 14521.

It is an arithmetic number, because the mean of its divisors is an integer number (3245508).

Almost surely, 2^31145026 is an apocalyptic number.

31145026 is a deficient number, since it is larger than the sum of its proper divisors (20783102).

31145026 is a wasteful number, since it uses less digits than its factorization.

31145026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26777.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 31145026 is about 5580.7728855419. The cubic root of 31145026 is about 314.6271762800.

Adding to 31145026 its reverse (62054113), we get a palindrome (93199139).

The spelling of 31145026 in words is "thirty-one million, one hundred forty-five thousand, twenty-six".