31380422 has 4 divisors (see below), whose sum is σ = 47070636. Its totient is φ = 15690210.

The previous prime is 31380409. The next prime is 31380431. The reversal of 31380422 is 22408313.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7845104 + ... + 7845107.

It is an arithmetic number, because the mean of its divisors is an integer number (11767659).

Almost surely, 2^31380422 is an apocalyptic number.

31380422 is a deficient number, since it is larger than the sum of its proper divisors (15690214).

31380422 is a wasteful number, since it uses less digits than its factorization.

31380422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15690213.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 31380422 is about 5601.8230961001. The cubic root of 31380422 is about 315.4178447485.

Adding to 31380422 its reverse (22408313), we get a palindrome (53788735).

The spelling of 31380422 in words is "thirty-one million, three hundred eighty thousand, four hundred twenty-two".