61137223 has 4 divisors (see below), whose sum is σ = 69871120. Its totient is φ = 52403328.

The previous prime is 61137221. The next prime is 61137227. The reversal of 61137223 is 32273116.

61137223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61137223 - 2¹ = 61137221 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 (61137221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4366938 + ... + 4366951.

It is an arithmetic number, because the mean of its divisors is an integer number (17467780).

Almost surely, 2^61137223 is an apocalyptic number.

61137223 is a deficient number, since it is larger than the sum of its proper divisors (8733897).

61137223 is an equidigital number, since it uses as much as digits as its factorization.

61137223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8733896.

The product of its digits is 1512, while the sum is 25.

The square root of 61137223 is about 7819.0295433641. The cubic root of 61137223 is about 393.9446764548.

The spelling of 61137223 in words is "sixty-one million, one hundred thirty-seven thousand, two hundred twenty-three".