61015000 has 40 divisors (see below), whose sum is σ = 142969860. Its totient is φ = 24404000.

The previous prime is 61014997. The next prime is 61015001. The reversal of 61015000 is 51016.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61015001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1102 + ... + 11101.

Almost surely, 2^61015000 is an apocalyptic number.

It is an amenable number.

61015000 is an abundant number, since it is smaller than the sum of its proper divisors (81954860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61015000 is a wasteful number, since it uses less digits than its factorization.

61015000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12229 (or 12210 counting only the distinct ones).

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

The square root of 61015000 is about 7811.2098934800. The cubic root of 61015000 is about 393.6819820361.

Adding to 61015000 its reverse (51016), we get a palindrome (61066016).

The spelling of 61015000 in words is "sixty-one million, fifteen thousand".