61213 has 4 divisors (see below), whose sum is σ = 62748. Its totient is φ = 59680.

The previous prime is 61211. The next prime is 61223. The reversal of 61213 is 31216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26244 + 34969 = 162^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 61213 - 2¹ = 61211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61193 and 61202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706 + ... + 787.

It is an arithmetic number, because the mean of its divisors is an integer number (15687).

2⁶¹²¹³ is an apocalyptic number.

It is an amenable number.

61213 is a deficient number, since it is larger than the sum of its proper divisors (1535).

61213 is a wasteful number, since it uses less digits than its factorization.

61213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534.

The product of its digits is 36, while the sum is 13.

The square root of 61213 is about 247.4126108346. The cubic root of 61213 is about 39.4107368507.

Adding to 61213 its reverse (31216), we get a palindrome (92429).

It can be divided in two parts, 612 and 13, that added together give a 4-th power (625 = 5⁴).

The spelling of 61213 in words is "sixty-one thousand, two hundred thirteen".