215254949452469 has 2 divisors, whose sum is σ = 215254949452470. Its totient is φ = 215254949452468.

The previous prime is 215254949452447. The next prime is 215254949452519. The reversal of 215254949452469 is 964254949452512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213876877720900 + 1378071731569 = 14624530^2 + 1173913^2 .

It is a cyclic number.

It is not a de Polignac number, because 215254949452469 - 2¹⁶ = 215254949386933 is a prime.

It is a super-2 number, since 2×215254949452469² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215254949452429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107627474726234 + 107627474726235.

It is an arithmetic number, because the mean of its divisors is an integer number (107627474726235).

Almost surely, 2^{215254949452469} is an apocalyptic number.

It is an amenable number.

215254949452469 is a deficient number, since it is larger than the sum of its proper divisors (1).

215254949452469 is an equidigital number, since it uses as much as digits as its factorization.

215254949452469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744000, while the sum is 71.

The spelling of 215254949452469 in words is "two hundred fifteen trillion, two hundred fifty-four billion, nine hundred forty-nine million, four hundred fifty-two thousand, four hundred sixty-nine".