61323321 has 4 divisors (see below), whose sum is σ = 81764432. Its totient is φ = 40882212.

The previous prime is 61323299. The next prime is 61323329. The reversal of 61323321 is 12332316.

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 61323321 - 2⁹ = 61322809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61323329) 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, 10220551 + ... + 10220556.

It is an arithmetic number, because the mean of its divisors is an integer number (20441108).

Almost surely, 2^61323321 is an apocalyptic number.

It is an amenable number.

61323321 is a deficient number, since it is larger than the sum of its proper divisors (20441111).

61323321 is a wasteful number, since it uses less digits than its factorization.

61323321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20441110.

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

The square root of 61323321 is about 7830.9208270803. The cubic root of 61323321 is about 394.3439861403.

Adding to 61323321 its reverse (12332316), we get a palindrome (73655637).

It can be divided in two parts, 6132 and 3321, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 61323321 in words is "sixty-one million, three hundred twenty-three thousand, three hundred twenty-one".