61222783 has 4 divisors (see below), whose sum is σ = 61393680. Its totient is φ = 61051888.

The previous prime is 61222781. The next prime is 61222789. The reversal of 61222783 is 38722216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61222783 - 2¹ = 61222781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61222781) 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, 84910 + ... + 85627.

It is an arithmetic number, because the mean of its divisors is an integer number (15348420).

Almost surely, 2^61222783 is an apocalyptic number.

61222783 is a deficient number, since it is larger than the sum of its proper divisors (170897).

61222783 is a wasteful number, since it uses less digits than its factorization.

61222783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170896.

The product of its digits is 8064, while the sum is 31.

The square root of 61222783 is about 7824.4988976931. The cubic root of 61222783 is about 394.1283626695.

Adding to 61222783 its reverse (38722216), we get a palindrome (99944999).

The spelling of 61222783 in words is "sixty-one million, two hundred twenty-two thousand, seven hundred eighty-three".