61535216 has 20 divisors (see below), whose sum is σ = 123336600. Its totient is φ = 29706432.

The previous prime is 61535213. The next prime is 61535231. The reversal of 61535216 is 61253516.

61535216 is nontrivially palindromic in base 14.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61535213) 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, 65846 + ... + 66773.

It is an arithmetic number, because the mean of its divisors is an integer number (6166830).

Almost surely, 2^61535216 is an apocalyptic number.

It is an amenable number.

61535216 is an abundant number, since it is smaller than the sum of its proper divisors (61801384).

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

61535216 is a wasteful number, since it uses less digits than its factorization.

61535216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132656 (or 132650 counting only the distinct ones).

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

The square root of 61535216 is about 7844.4385395005. The cubic root of 61535216 is about 394.7976659627.

The spelling of 61535216 in words is "sixty-one million, five hundred thirty-five thousand, two hundred sixteen".