141515221 has 2 divisors, whose sum is σ = 141515222. Its totient is φ = 141515220.

The previous prime is 141515203. The next prime is 141515233. The reversal of 141515221 is 122515141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 1920996 = 11815^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 141515221 - 2¹¹ = 141513173 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 141515192 and 141515201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141515201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70757610 + 70757611.

It is an arithmetic number, because the mean of its divisors is an integer number (70757611).

Almost surely, 2^141515221 is an apocalyptic number.

It is an amenable number.

141515221 is a deficient number, since it is larger than the sum of its proper divisors (1).

141515221 is an equidigital number, since it uses as much as digits as its factorization.

141515221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 22.

The square root of 141515221 is about 11896.0170225164. The cubic root of 141515221 is about 521.1159723804.

The spelling of 141515221 in words is "one hundred forty-one million, five hundred fifteen thousand, two hundred twenty-one".