61720022 has 16 divisors (see below), whose sum is σ = 113944992. Its totient is φ = 24416640.

The previous prime is 61720019. The next prime is 61720079. The reversal of 61720022 is 22002716.

It is a super-2 number, since 2×61720022² = 7618722231360968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61719976 and 61720003.

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, 169379 + ... + 169742.

It is an arithmetic number, because the mean of its divisors is an integer number (7121562).

Almost surely, 2^61720022 is an apocalyptic number.

61720022 is a deficient number, since it is larger than the sum of its proper divisors (52224970).

61720022 is a wasteful number, since it uses less digits than its factorization.

61720022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339143.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 61720022 is about 7856.2091367275. The cubic root of 61720022 is about 395.1924971052.

Adding to 61720022 its reverse (22002716), we get a palindrome (83722738).

The spelling of 61720022 in words is "sixty-one million, seven hundred twenty thousand, twenty-two".