61321712 has 20 divisors (see below), whose sum is σ = 120148560. Its totient is φ = 30315648.

The previous prime is 61321661. The next prime is 61321717. The reversal of 61321712 is 21712316.

It is a super-2 number, since 2×61321712² = 7520704725221888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61321717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20108 + ... + 22955.

It is an arithmetic number, because the mean of its divisors is an integer number (6007428).

Almost surely, 2^61321712 is an apocalyptic number.

It is an amenable number.

61321712 is a deficient number, since it is larger than the sum of its proper divisors (58826848).

61321712 is a wasteful number, since it uses less digits than its factorization.

61321712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43160 (or 43154 counting only the distinct ones).

The product of its digits is 504, while the sum is 23.

The square root of 61321712 is about 7830.8180926389. The cubic root of 61321712 is about 394.3405371804.

The spelling of 61321712 in words is "sixty-one million, three hundred twenty-one thousand, seven hundred twelve".