61520205 has 8 divisors (see below), whose sum is σ = 98432352. Its totient is φ = 32810768.

The previous prime is 61520203. The next prime is 61520219. The reversal of 61520205 is 50202516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61520205 - 2¹ = 61520203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61520203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2050659 + ... + 2050688.

It is an arithmetic number, because the mean of its divisors is an integer number (12304044).

Almost surely, 2^61520205 is an apocalyptic number.

It is an amenable number.

61520205 is a deficient number, since it is larger than the sum of its proper divisors (36912147).

61520205 is a wasteful number, since it uses less digits than its factorization.

61520205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101355.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 61520205 is about 7843.4816886380. The cubic root of 61520205 is about 394.7655608252.

The spelling of 61520205 in words is "sixty-one million, five hundred twenty thousand, two hundred five".