61438223 has 16 divisors (see below), whose sum is σ = 77324544. Its totient is φ = 47420160.

The previous prime is 61438219. The next prime is 61438253. The reversal of 61438223 is 32283416.

It is a cyclic number.

It is not a de Polignac number, because 61438223 - 2² = 61438219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61438253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4511 + ... + 11967.

It is an arithmetic number, because the mean of its divisors is an integer number (4832784).

Almost surely, 2^61438223 is an apocalyptic number.

61438223 is a deficient number, since it is larger than the sum of its proper divisors (15886321).

61438223 is a wasteful number, since it uses less digits than its factorization.

61438223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7582.

The product of its digits is 6912, while the sum is 29.

The square root of 61438223 is about 7838.2538233971. The cubic root of 61438223 is about 394.5901276384.

The spelling of 61438223 in words is "sixty-one million, four hundred thirty-eight thousand, two hundred twenty-three".