61223133 has 4 divisors (see below), whose sum is σ = 81630848. Its totient is φ = 40815420.

The previous prime is 61223131. The next prime is 61223177. The reversal of 61223133 is 33132216.

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 not a de Polignac number, because 61223133 - 2¹ = 61223131 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61223131) 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, 10203853 + ... + 10203858.

It is an arithmetic number, because the mean of its divisors is an integer number (20407712).

Almost surely, 2^61223133 is an apocalyptic number.

It is an amenable number.

61223133 is a deficient number, since it is larger than the sum of its proper divisors (20407715).

61223133 is a wasteful number, since it uses less digits than its factorization.

61223133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20407714.

The product of its digits is 648, while the sum is 21.

The square root of 61223133 is about 7824.5212633106. The cubic root of 61223133 is about 394.1291137225.

Adding to 61223133 its reverse (33132216), we get a palindrome (94355349).

The spelling of 61223133 in words is "sixty-one million, two hundred twenty-three thousand, one hundred thirty-three".