61205051 has 4 divisors (see below), whose sum is σ = 63315600. Its totient is φ = 59094504.

The previous prime is 61205029. The next prime is 61205057. The reversal of 61205051 is 15050216.

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 61205051 - 2¹⁰ = 61204027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61205057) 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, 1055231 + ... + 1055288.

It is an arithmetic number, because the mean of its divisors is an integer number (15828900).

Almost surely, 2^61205051 is an apocalyptic number.

61205051 is a deficient number, since it is larger than the sum of its proper divisors (2110549).

61205051 is a wasteful number, since it uses less digits than its factorization.

61205051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110548.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 61205051 is about 7823.3657079290. The cubic root of 61205051 is about 394.0903084322.

Adding to 61205051 its reverse (15050216), we get a palindrome (76255267).

The spelling of 61205051 in words is "sixty-one million, two hundred five thousand, fifty-one".