61321013 has 16 divisors (see below), whose sum is σ = 69960576. Its totient is φ = 53317440.

The previous prime is 61321009. The next prime is 61321021. The reversal of 61321013 is 31012316.

It is a cyclic number.

It is not a de Polignac number, because 61321013 - 2² = 61321009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61320982 and 61321000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61321003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18503 + ... + 21563.

It is an arithmetic number, because the mean of its divisors is an integer number (4372536).

Almost surely, 2^61321013 is an apocalyptic number.

It is an amenable number.

61321013 is a deficient number, since it is larger than the sum of its proper divisors (8639563).

61321013 is a wasteful number, since it uses less digits than its factorization.

61321013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 61321013 is about 7830.7734611595. The cubic root of 61321013 is about 394.3390388254.

Adding to 61321013 its reverse (31012316), we get a palindrome (92333329).

The spelling of 61321013 in words is "sixty-one million, three hundred twenty-one thousand, thirteen".