61225244252215 has 8 divisors (see below), whose sum is σ = 73664146121040. Its totient is φ = 48850960056192.

The previous prime is 61225244252209. The next prime is 61225244252233. The reversal of 61225244252215 is 51225244252216.

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-61225244252215 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16154416114 + ... + 16154419903.

It is an arithmetic number, because the mean of its divisors is an integer number (9208018265130).

Almost surely, 2^{61225244252215} is an apocalyptic number.

61225244252215 is a deficient number, since it is larger than the sum of its proper divisors (12438901868825).

61225244252215 is a wasteful number, since it uses less digits than its factorization.

61225244252215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32308836401.

The product of its digits is 768000, while the sum is 43.

Subtracting from 61225244252215 its reverse (51225244252216), we obtain a palindrome (9999999999999).

The spelling of 61225244252215 in words is "sixty-one trillion, two hundred twenty-five billion, two hundred forty-four million, two hundred fifty-two thousand, two hundred fifteen".