61722012 has 24 divisors (see below), whose sum is σ = 157110912. Its totient is φ = 18703600.

The previous prime is 61722007. The next prime is 61722047. The reversal of 61722012 is 21022716.

It is a self number, because there is not a number n which added to its sum of digits gives 61722012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233664 + ... + 233927.

It is an arithmetic number, because the mean of its divisors is an integer number (6546288).

Almost surely, 2^61722012 is an apocalyptic number.

It is an amenable number.

61722012 is an abundant number, since it is smaller than the sum of its proper divisors (95388900).

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

61722012 is a wasteful number, since it uses less digits than its factorization.

61722012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467609 (or 467607 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 61722012 is about 7856.3357871211. The cubic root of 61722012 is about 395.1967443743.

Adding to 61722012 its reverse (21022716), we get a palindrome (82744728).

The spelling of 61722012 in words is "sixty-one million, seven hundred twenty-two thousand, twelve".