61205651 has 4 divisors (see below), whose sum is σ = 65913792. Its totient is φ = 56497512.

The previous prime is 61205647. The next prime is 61205653. The reversal of 61205651 is 15650216.

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 61205651 - 2² = 61205647 is a prime.

It is a super-2 number, since 2×61205651² = 7492263428667602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61205651.

It is not an unprimeable number, because it can be changed into a prime (61205653) 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, 2354051 + ... + 2354076.

It is an arithmetic number, because the mean of its divisors is an integer number (16478448).

Almost surely, 2^61205651 is an apocalyptic number.

61205651 is a deficient number, since it is larger than the sum of its proper divisors (4708141).

61205651 is a wasteful number, since it uses less digits than its factorization.

61205651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708140.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 61205651 is about 7823.4040545021. The cubic root of 61205651 is about 394.0915961985.

Adding to 61205651 its reverse (15650216), we get a palindrome (76855867).

The spelling of 61205651 in words is "sixty-one million, two hundred five thousand, six hundred fifty-one".