61218283 has 8 divisors (see below), whose sum is σ = 71591168. Its totient is φ = 51252264.

The previous prime is 61218281. The next prime is 61218293. The reversal of 61218283 is 38281216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61218283 - 2¹ = 61218281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61218281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101391 + ... + 101992.

It is an arithmetic number, because the mean of its divisors is an integer number (8948896).

Almost surely, 2^61218283 is an apocalyptic number.

61218283 is a deficient number, since it is larger than the sum of its proper divisors (10372885).

61218283 is a wasteful number, since it uses less digits than its factorization.

61218283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203433.

The product of its digits is 4608, while the sum is 31.

The square root of 61218283 is about 7824.2113340579. The cubic root of 61218283 is about 394.1187060188.

Adding to 61218283 its reverse (38281216), we get a palindrome (99499499).

The spelling of 61218283 in words is "sixty-one million, two hundred eighteen thousand, two hundred eighty-three".