219432897 has 6 divisors (see below), whose sum is σ = 316958642. Its totient is φ = 146288592.

The previous prime is 219432893. The next prime is 219432901. The reversal of 219432897 is 798234912.

It is an interprime number because it is at equal distance from previous prime (219432893) and next prime (219432901).

It can be written as a sum of positive squares in only one way, i.e., 167029776 + 52403121 = 12924^2 + 7239^2 .

It is not a de Polignac number, because 219432897 - 2² = 219432893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219432893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12190708 + ... + 12190725.

Almost surely, 2^219432897 is an apocalyptic number.

It is an amenable number.

219432897 is a deficient number, since it is larger than the sum of its proper divisors (97525745).

219432897 is a wasteful number, since it uses less digits than its factorization.

219432897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24381439 (or 24381436 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 219432897 is about 14813.2676003642. The cubic root of 219432897 is about 603.1619162062.

The spelling of 219432897 in words is "two hundred nineteen million, four hundred thirty-two thousand, eight hundred ninety-seven".