61520216 has 16 divisors (see below), whose sum is σ = 120366000. Its totient is φ = 29422624.

The previous prime is 61520203. The next prime is 61520219. The reversal of 61520216 is 61202516.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 61520191 and 61520200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61520219) 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, 166991 + ... + 167358.

It is an arithmetic number, because the mean of its divisors is an integer number (7522875).

Almost surely, 2^61520216 is an apocalyptic number.

It is an amenable number.

61520216 is a deficient number, since it is larger than the sum of its proper divisors (58845784).

61520216 is a wasteful number, since it uses less digits than its factorization.

61520216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334378 (or 334374 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 61520216 is about 7843.4823898572. The cubic root of 61520216 is about 394.7655843536.

The spelling of 61520216 in words is "sixty-one million, five hundred twenty thousand, two hundred sixteen".