61218265 has 8 divisors (see below), whose sum is σ = 74023488. Its totient is φ = 48600240.

The previous prime is 61218263. The next prime is 61218271. The reversal of 61218265 is 56281216.

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

It is not a de Polignac number, because 61218265 - 2¹ = 61218263 is a prime.

It is a super-2 number, since 2×61218265² = 7495351939220450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61218263) 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, 46077 + ... + 47386.

It is an arithmetic number, because the mean of its divisors is an integer number (9252936).

Almost surely, 2^61218265 is an apocalyptic number.

It is an amenable number.

61218265 is a deficient number, since it is larger than the sum of its proper divisors (12805223).

61218265 is a wasteful number, since it uses less digits than its factorization.

61218265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93599.

The product of its digits is 5760, while the sum is 31.

The square root of 61218265 is about 7824.2101837821. The cubic root of 61218265 is about 394.1186673913.

The spelling of 61218265 in words is "sixty-one million, two hundred eighteen thousand, two hundred sixty-five".