61420218 has 32 divisors (see below), whose sum is σ = 130403520. Its totient is φ = 19219200.

The previous prime is 61420213. The next prime is 61420223. The reversal of 61420218 is 81202416.

It is an interprime number because it is at equal distance from previous prime (61420213) and next prime (61420223).

It is not an unprimeable number, because it can be changed into a prime (61420213) 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, 71073 + ... + 71931.

It is an arithmetic number, because the mean of its divisors is an integer number (4075110).

Almost surely, 2^61420218 is an apocalyptic number.

61420218 is an abundant number, since it is smaller than the sum of its proper divisors (68983302).

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

61420218 is a wasteful number, since it uses less digits than its factorization.

61420218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582.

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

The square root of 61420218 is about 7837.1052053676. The cubic root of 61420218 is about 394.5515778615.

The spelling of 61420218 in words is "sixty-one million, four hundred twenty thousand, two hundred eighteen".