61321722 has 64 divisors (see below), whose sum is σ = 153750528. Its totient is φ = 15840000.

The previous prime is 61321717. The next prime is 61321763. The reversal of 61321722 is 22712316.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 61321692 and 61321701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152722 + ... + 153122.

It is an arithmetic number, because the mean of its divisors is an integer number (2402352).

Almost surely, 2^61321722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61321722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76875264).

61321722 is an abundant number, since it is smaller than the sum of its proper divisors (92428806).

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

61321722 is a wasteful number, since it uses less digits than its factorization.

61321722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755.

The product of its digits is 1008, while the sum is 24.

The square root of 61321722 is about 7830.8187311417. The cubic root of 61321722 is about 394.3405586160.

The spelling of 61321722 in words is "sixty-one million, three hundred twenty-one thousand, seven hundred twenty-two".