61506115 has 12 divisors (see below), whose sum is σ = 81127872. Its totient is φ = 44731280.

The previous prime is 61506103. The next prime is 61506131. The reversal of 61506115 is 51160516.

It is not a de Polignac number, because 61506115 - 2⁵ = 61506083 is a prime.

It is a super-3 number, since 3×61506115³ (a number of 24 digits) contains 333 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 61506115.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50227 + ... + 51436.

It is an arithmetic number, because the mean of its divisors is an integer number (6760656).

Almost surely, 2^61506115 is an apocalyptic number.

61506115 is a deficient number, since it is larger than the sum of its proper divisors (19621757).

61506115 is a wasteful number, since it uses less digits than its factorization.

61506115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101690 (or 101679 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 61506115 is about 7842.5834391481. The cubic root of 61506115 is about 394.7354207465.

The spelling of 61506115 in words is "sixty-one million, five hundred six thousand, one hundred fifteen".