61415213 has 4 divisors (see below), whose sum is σ = 62280288. Its totient is φ = 60550140.

The previous prime is 61415143. The next prime is 61415219. The reversal of 61415213 is 31251416.

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 61415213 - 2¹² = 61411117 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 (61415219) 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, 432431 + ... + 432572.

It is an arithmetic number, because the mean of its divisors is an integer number (15570072).

Almost surely, 2^61415213 is an apocalyptic number.

It is an amenable number.

61415213 is a deficient number, since it is larger than the sum of its proper divisors (865075).

61415213 is an equidigital number, since it uses as much as digits as its factorization.

61415213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865074.

The product of its digits is 720, while the sum is 23.

The square root of 61415213 is about 7836.7858845320. The cubic root of 61415213 is about 394.5408605203.

Adding to 61415213 its reverse (31251416), we get a palindrome (92666629).

The spelling of 61415213 in words is "sixty-one million, four hundred fifteen thousand, two hundred thirteen".