61218201 has 8 divisors (see below), whose sum is σ = 89044704. Its totient is φ = 37101920.

The previous prime is 61218193. The next prime is 61218251. The reversal of 61218201 is 10281216.

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

It is a cyclic number.

It is not a de Polignac number, because 61218201 - 2³ = 61218193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61218251) 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, 927516 + ... + 927581.

It is an arithmetic number, because the mean of its divisors is an integer number (11130588).

Almost surely, 2^61218201 is an apocalyptic number.

It is an amenable number.

61218201 is a deficient number, since it is larger than the sum of its proper divisors (27826503).

61218201 is a wasteful number, since it uses less digits than its factorization.

61218201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855111.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 61218201 is about 7824.2060939114. The cubic root of 61218201 is about 394.1185300488.

Adding to 61218201 its reverse (10281216), we get a palindrome (71499417).

The spelling of 61218201 in words is "sixty-one million, two hundred eighteen thousand, two hundred one".