61534321 has 4 divisors (see below), whose sum is σ = 61558272. Its totient is φ = 61510372.

The previous prime is 61534307. The next prime is 61534357. The reversal of 61534321 is 12343516.

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 not a de Polignac number, because 61534321 - 2¹⁷ = 61403249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61534621) 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, 7585 + ... + 13438.

It is an arithmetic number, because the mean of its divisors is an integer number (15389568).

Almost surely, 2^61534321 is an apocalyptic number.

It is an amenable number.

61534321 is a deficient number, since it is larger than the sum of its proper divisors (23951).

61534321 is a wasteful number, since it uses less digits than its factorization.

61534321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23950.

The product of its digits is 2160, while the sum is 25.

The square root of 61534321 is about 7844.3814925079. The cubic root of 61534321 is about 394.7957519063.

Adding to 61534321 its reverse (12343516), we get a palindrome (73877837).

The spelling of 61534321 in words is "sixty-one million, five hundred thirty-four thousand, three hundred twenty-one".