61855229 has 4 divisors (see below), whose sum is σ = 61884960. Its totient is φ = 61825500.

The previous prime is 61855219. The next prime is 61855253. The reversal of 61855229 is 92255816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61855229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61855192 and 61855201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61855219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11489 + ... + 15990.

It is an arithmetic number, because the mean of its divisors is an integer number (15471240).

Almost surely, 2^61855229 is an apocalyptic number.

It is an amenable number.

61855229 is a deficient number, since it is larger than the sum of its proper divisors (29731).

61855229 is a wasteful number, since it uses less digits than its factorization.

61855229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29730.

The product of its digits is 43200, while the sum is 38.

The square root of 61855229 is about 7864.8095336124. The cubic root of 61855229 is about 395.4808628582.

The spelling of 61855229 in words is "sixty-one million, eight hundred fifty-five thousand, two hundred twenty-nine".