61614221 has 2 divisors, whose sum is σ = 61614222. Its totient is φ = 61614220.

The previous prime is 61614199. The next prime is 61614229. The reversal of 61614221 is 12241616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44689225 + 16924996 = 6685^2 + 4114^2 .

It is a cyclic number.

It is not a de Polignac number, because 61614221 - 2²² = 57419917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61614229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30807110 + 30807111.

It is an arithmetic number, because the mean of its divisors is an integer number (30807111).

Almost surely, 2^61614221 is an apocalyptic number.

It is an amenable number.

61614221 is a deficient number, since it is larger than the sum of its proper divisors (1).

61614221 is an equidigital number, since it uses as much as digits as its factorization.

61614221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 61614221 is about 7849.4726574465. The cubic root of 61614221 is about 394.9665538096.

Adding to 61614221 its reverse (12241616), we get a palindrome (73855837).

The spelling of 61614221 in words is "sixty-one million, six hundred fourteen thousand, two hundred twenty-one".