61885215 has 80 divisors (see below), whose sum is σ = 128798208. Its totient is φ = 27843264.

The previous prime is 61885193. The next prime is 61885231. The reversal of 61885215 is 51258816.

It is not a de Polignac number, because 61885215 - 2²⁰ = 60836639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61885215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 235174 + ... + 235436.

Almost surely, 2^61885215 is an apocalyptic number.

61885215 is an abundant number, since it is smaller than the sum of its proper divisors (66912993).

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

61885215 is a wasteful number, since it uses less digits than its factorization.

61885215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 361 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 61885215 is about 7866.7156425029. The cubic root of 61885215 is about 395.5447592258.

The spelling of 61885215 in words is "sixty-one million, eight hundred eighty-five thousand, two hundred fifteen".