61047515 has 4 divisors (see below), whose sum is σ = 73257024. Its totient is φ = 48838008.

The previous prime is 61047473. The next prime is 61047533. The reversal of 61047515 is 51574016.

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 61047515 - 2¹² = 61043419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6104747 + ... + 6104756.

It is an arithmetic number, because the mean of its divisors is an integer number (18314256).

Almost surely, 2^61047515 is an apocalyptic number.

61047515 is a deficient number, since it is larger than the sum of its proper divisors (12209509).

61047515 is a wasteful number, since it uses less digits than its factorization.

61047515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12209508.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 61047515 is about 7813.2909199645. The cubic root of 61047515 is about 393.7519008895.

The spelling of 61047515 in words is "sixty-one million, forty-seven thousand, five hundred fifteen".