61622015 has 16 divisors (see below), whose sum is σ = 91011648. Its totient is φ = 39004416.

The previous prime is 61621999. The next prime is 61622023. The reversal of 61622015 is 51022616.

It is a cyclic number.

It is not a de Polignac number, because 61622015 - 2⁴ = 61621999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67262 + ... + 68171.

It is an arithmetic number, because the mean of its divisors is an integer number (5688228).

Almost surely, 2^61622015 is an apocalyptic number.

61622015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61622015 is a deficient number, since it is larger than the sum of its proper divisors (29389633).

61622015 is a wasteful number, since it uses less digits than its factorization.

61622015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135458.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 61622015 is about 7849.9691082195. The cubic root of 61622015 is about 394.9832071053.

The spelling of 61622015 in words is "sixty-one million, six hundred twenty-two thousand, fifteen".