61215536 has 20 divisors (see below), whose sum is σ = 119830872. Its totient is φ = 30291456.

The previous prime is 61215533. The next prime is 61215541. The reversal of 61215536 is 63551216.

It is a junction number, because it is equal to n+sod(n) for n = 61215499 and 61215508.

It is not an unprimeable number, because it can be changed into a prime (61215533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18170 + ... + 21273.

Almost surely, 2^61215536 is an apocalyptic number.

It is an amenable number.

61215536 is a deficient number, since it is larger than the sum of its proper divisors (58615336).

61215536 is a wasteful number, since it uses less digits than its factorization.

61215536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39548 (or 39542 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 61215536 is about 7824.0357872392. The cubic root of 61215536 is about 394.1128109375.

The spelling of 61215536 in words is "sixty-one million, two hundred fifteen thousand, five hundred thirty-six".