31061980 has 12 divisors (see below), whose sum is σ = 65230200. Its totient is φ = 12424784.

The previous prime is 31061963. The next prime is 31062001. The reversal of 31061980 is 8916013.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776530 + ... + 776569.

It is an arithmetic number, because the mean of its divisors is an integer number (5435850).

Almost surely, 2^31061980 is an apocalyptic number.

It is an amenable number.

31061980 is an abundant number, since it is smaller than the sum of its proper divisors (34168220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31061980 is a wasteful number, since it uses less digits than its factorization.

31061980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553108 (or 1553106 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 31061980 is about 5573.3275518311. The cubic root of 31061980 is about 314.3472836873.

Adding to 31061980 its reverse (8916013), we get a palindrome (39977993).

It can be divided in two parts, 31061 and 980, that added together give a square (32041 = 179²).

The spelling of 31061980 in words is "thirty-one million, sixty-one thousand, nine hundred eighty".