61225413 has 4 divisors (see below), whose sum is σ = 81633888. Its totient is φ = 40816940.

The previous prime is 61225397. The next prime is 61225427. The reversal of 61225413 is 31452216.

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 61225413 - 2⁴ = 61225397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61225613) 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, 10204233 + ... + 10204238.

It is an arithmetic number, because the mean of its divisors is an integer number (20408472).

Almost surely, 2^61225413 is an apocalyptic number.

It is an amenable number.

61225413 is a deficient number, since it is larger than the sum of its proper divisors (20408475).

61225413 is a wasteful number, since it uses less digits than its factorization.

61225413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20408474.

The product of its digits is 1440, while the sum is 24.

The square root of 61225413 is about 7824.6669577689. Note that the first 3 decimals coincide. The cubic root of 61225413 is about 394.1340062263.

Adding to 61225413 its reverse (31452216), we get a palindrome (92677629).

The spelling of 61225413 in words is "sixty-one million, two hundred twenty-five thousand, four hundred thirteen".