61452216 has 128 divisors (see below), whose sum is σ = 197568000. Its totient is φ = 17335296.

The previous prime is 61452191. The next prime is 61452221. The reversal of 61452216 is 61225416.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 61452216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146455 + ... + 146873.

It is an arithmetic number, because the mean of its divisors is an integer number (1543500).

Almost surely, 2^61452216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61452216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98784000).

61452216 is an abundant number, since it is smaller than the sum of its proper divisors (136115784).

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

61452216 is a wasteful number, since it uses less digits than its factorization.

61452216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 528 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 61452216 is about 7839.1463821005. The cubic root of 61452216 is about 394.6200822837.

The spelling of 61452216 in words is "sixty-one million, four hundred fifty-two thousand, two hundred sixteen".