61562261 has 4 divisors (see below), whose sum is σ = 64802400. Its totient is φ = 58322124.

The previous prime is 61562243. The next prime is 61562297. The reversal of 61562261 is 16226516.

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 61562261 - 2¹⁰ = 61561237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61562201) 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, 1620041 + ... + 1620078.

It is an arithmetic number, because the mean of its divisors is an integer number (16200600).

Almost surely, 2^61562261 is an apocalyptic number.

It is an amenable number.

61562261 is a deficient number, since it is larger than the sum of its proper divisors (3240139).

61562261 is a wasteful number, since it uses less digits than its factorization.

61562261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240138.

The product of its digits is 4320, while the sum is 29.

The square root of 61562261 is about 7846.1621828764. The cubic root of 61562261 is about 394.8554959323.

Adding to 61562261 its reverse (16226516), we get a palindrome (77788777).

The spelling of 61562261 in words is "sixty-one million, five hundred sixty-two thousand, two hundred sixty-one".