61018224 has 20 divisors (see below), whose sum is σ = 157630536. Its totient is φ = 20339392.

The previous prime is 61018193. The next prime is 61018229. The reversal of 61018224 is 42281016.

It is a super-2 number, since 2×61018224² = 7446447320228352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 61018194 and 61018203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61018229) 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, 635559 + ... + 635654.

Almost surely, 2^61018224 is an apocalyptic number.

It is an amenable number.

61018224 is an abundant number, since it is smaller than the sum of its proper divisors (96612312).

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

61018224 is a wasteful number, since it uses less digits than its factorization.

61018224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271224 (or 1271218 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 61018224 is about 7811.4162608326. The cubic root of 61018224 is about 393.6889158959.

The spelling of 61018224 in words is "sixty-one million, eighteen thousand, two hundred twenty-four".