1151898217 has 4 divisors (see below), whose sum is σ = 1189056256. Its totient is φ = 1114740180.

The previous prime is 1151898211. The next prime is 1151898221. The reversal of 1151898217 is 7128981511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7128981511 = 863 ⋅8260697.

It is a cyclic number.

It is not a de Polignac number, because 1151898217 - 2¹⁹ = 1151373929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151898211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18578973 + ... + 18579034.

It is an arithmetic number, because the mean of its divisors is an integer number (297264064).

Almost surely, 2^1151898217 is an apocalyptic number.

It is an amenable number.

1151898217 is a deficient number, since it is larger than the sum of its proper divisors (37158039).

1151898217 is an equidigital number, since it uses as much as digits as its factorization.

1151898217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37158038.

The product of its digits is 40320, while the sum is 43.

The square root of 1151898217 is about 33939.6260586354. The cubic root of 1151898217 is about 1048.2656832880.

The spelling of 1151898217 in words is "one billion, one hundred fifty-one million, eight hundred ninety-eight thousand, two hundred seventeen".