61780214 has 4 divisors (see below), whose sum is σ = 92670324. Its totient is φ = 30890106.

The previous prime is 61780211. The next prime is 61780217. The reversal of 61780214 is 41208716.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61780211) and next prime (61780217).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61780211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15445052 + ... + 15445055.

It is an arithmetic number, because the mean of its divisors is an integer number (23167581).

Almost surely, 2^61780214 is an apocalyptic number.

61780214 is a deficient number, since it is larger than the sum of its proper divisors (30890110).

61780214 is a wasteful number, since it uses less digits than its factorization.

61780214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30890109.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 61780214 is about 7860.0390584271. The cubic root of 61780214 is about 395.3209248956.

The spelling of 61780214 in words is "sixty-one million, seven hundred eighty thousand, two hundred fourteen".