1615223233249 has 2 divisors, whose sum is σ = 1615223233250. Its totient is φ = 1615223233248.

The previous prime is 1615223233199. The next prime is 1615223233271. The reversal of 1615223233249 is 9423323225161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1614279514849 + 943718400 = 1270543^2 + 30720^2 .

It is an emirp because it is prime and its reverse (9423323225161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1615223233249 - 2²⁷ = 1615089015521 is a prime.

It is a super-4 number, since 4×1615223233249⁴ (a number of 50 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (1615223233849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807611616624 + 807611616625.

It is an arithmetic number, because the mean of its divisors is an integer number (807611616625).

Almost surely, 2^{1615223233249} is an apocalyptic number.

It is an amenable number.

1615223233249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615223233249 is an equidigital number, since it uses as much as digits as its factorization.

1615223233249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 43.

The spelling of 1615223233249 in words is "one trillion, six hundred fifteen billion, two hundred twenty-three million, two hundred thirty-three thousand, two hundred forty-nine".