61000015 has 8 divisors (see below), whose sum is σ = 74902608. Its totient is φ = 47664960.

The previous prime is 61000003. The next prime is 61000039. The reversal of 61000015 is 51000016.

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

It is not a de Polignac number, because 61000015 - 2⁹ = 60999503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 60999959 and 61000004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141646 + ... + 142075.

It is an arithmetic number, because the mean of its divisors is an integer number (9362826).

Almost surely, 2^61000015 is an apocalyptic number.

61000015 is a deficient number, since it is larger than the sum of its proper divisors (13902593).

61000015 is a wasteful number, since it uses less digits than its factorization.

61000015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283769.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 61000015 is about 7810.2506361832. The cubic root of 61000015 is about 393.6497505766.

Subtracting from 61000015 its reverse (51000016), we obtain a palindrome (9999999).

The spelling of 61000015 in words is "sixty-one million, fifteen", and thus it is an aban number and an uban number.