61222513 has 8 divisors (see below), whose sum is σ = 66845376. Its totient is φ = 55609200.

The previous prime is 61222507. The next prime is 61222537. The reversal of 61222513 is 31522216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61222513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61226513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21228 + ... + 23938.

It is an arithmetic number, because the mean of its divisors is an integer number (8355672).

Almost surely, 2^61222513 is an apocalyptic number.

It is an amenable number.

61222513 is a deficient number, since it is larger than the sum of its proper divisors (5622863).

61222513 is a wasteful number, since it uses less digits than its factorization.

61222513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775.

The product of its digits is 720, while the sum is 22.

The square root of 61222513 is about 7824.4816441730. The cubic root of 61222513 is about 394.1277832838.

Adding to 61222513 its reverse (31522216), we get a palindrome (92744729).

The spelling of 61222513 in words is "sixty-one million, two hundred twenty-two thousand, five hundred thirteen".