61306223 has 6 divisors (see below), whose sum is σ = 67386312. Its totient is φ = 55732820.

The previous prime is 61306187. The next prime is 61306241. The reversal of 61306223 is 32260316.

It is not a de Polignac number, because 61306223 - 2¹² = 61302127 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 (61306253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253211 + ... + 253452.

It is an arithmetic number, because the mean of its divisors is an integer number (11231052).

Almost surely, 2^61306223 is an apocalyptic number.

61306223 is a deficient number, since it is larger than the sum of its proper divisors (6080089).

61306223 is a wasteful number, since it uses less digits than its factorization.

61306223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506685 (or 506674 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 61306223 is about 7829.8290530509. The cubic root of 61306223 is about 394.3073327643.

Adding to 61306223 its reverse (32260316), we get a palindrome (93566539).

The spelling of 61306223 in words is "sixty-one million, three hundred six thousand, two hundred twenty-three".