61527513 has 4 divisors (see below), whose sum is σ = 82036688. Its totient is φ = 41018340.

The previous prime is 61527509. The next prime is 61527523. The reversal of 61527513 is 31572516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61527513 - 2² = 61527509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61527523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10254583 + ... + 10254588.

It is an arithmetic number, because the mean of its divisors is an integer number (20509172).

Almost surely, 2^61527513 is an apocalyptic number.

It is an amenable number.

61527513 is a deficient number, since it is larger than the sum of its proper divisors (20509175).

61527513 is a wasteful number, since it uses less digits than its factorization.

61527513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20509174.

The product of its digits is 6300, while the sum is 30.

The square root of 61527513 is about 7843.9475393452. The cubic root of 61527513 is about 394.7811916383.

The spelling of 61527513 in words is "sixty-one million, five hundred twenty-seven thousand, five hundred thirteen".