61860213 has 8 divisors (see below), whose sum is σ = 91644800. Its totient is φ = 41240124.

The previous prime is 61860209. The next prime is 61860223. The reversal of 61860213 is 31206816.

It is not a de Polignac number, because 61860213 - 2² = 61860209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2291119 = 61860213 / (6 + 1 + 8 + 6 + 0 + 2 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61860203) 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, 1145533 + ... + 1145586.

It is an arithmetic number, because the mean of its divisors is an integer number (11455600).

Almost surely, 2^61860213 is an apocalyptic number.

It is an amenable number.

61860213 is a deficient number, since it is larger than the sum of its proper divisors (29784587).

61860213 is a wasteful number, since it uses less digits than its factorization.

61860213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291128 (or 2291122 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 61860213 is about 7865.1263816928. The cubic root of 61860213 is about 395.4914845615.

The spelling of 61860213 in words is "sixty-one million, eight hundred sixty thousand, two hundred thirteen".