61542211 has 4 divisors (see below), whose sum is σ = 63205552. Its totient is φ = 59878872.

The previous prime is 61542199. The next prime is 61542233. The reversal of 61542211 is 11224516.

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

It is a cyclic number.

It is not a de Polignac number, because 61542211 - 2⁹ = 61541699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61542241) 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, 831615 + ... + 831688.

It is an arithmetic number, because the mean of its divisors is an integer number (15801388).

Almost surely, 2^61542211 is an apocalyptic number.

61542211 is a deficient number, since it is larger than the sum of its proper divisors (1663341).

61542211 is a wasteful number, since it uses less digits than its factorization.

61542211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663340.

The product of its digits is 480, while the sum is 22.

The square root of 61542211 is about 7844.8843841066. The cubic root of 61542211 is about 394.8126249039.

Adding to 61542211 its reverse (11224516), we get a palindrome (72766727).

The spelling of 61542211 in words is "sixty-one million, five hundred forty-two thousand, two hundred eleven".