61216263 has 16 divisors (see below), whose sum is σ = 90841600. Its totient is φ = 40743000.

The previous prime is 61216237. The next prime is 61216273. The reversal of 61216263 is 36261216.

It is not a de Polignac number, because 61216263 - 2⁹ = 61215751 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61216213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18768 + ... + 21786.

It is an arithmetic number, because the mean of its divisors is an integer number (5677600).

Almost surely, 2^61216263 is an apocalyptic number.

61216263 is a deficient number, since it is larger than the sum of its proper divisors (29625337).

61216263 is a wasteful number, since it uses less digits than its factorization.

61216263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779 (or 3773 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 61216263 is about 7824.0822465002. The cubic root of 61216263 is about 394.1143711018.

Adding to 61216263 its reverse (36261216), we get a palindrome (97477479).

The spelling of 61216263 in words is "sixty-one million, two hundred sixteen thousand, two hundred sixty-three".