815142898 has 4 divisors (see below), whose sum is σ = 1222714350. Its totient is φ = 407571448.

The previous prime is 815142869. The next prime is 815142907. The reversal of 815142898 is 898241518.

It is a happy number.

815142898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 898241518 = 2 ⋅449120759.

It can be written as a sum of positive squares in only one way, i.e., 654182929 + 160959969 = 25577^2 + 12687^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203785723 + ... + 203785726.

Almost surely, 2^815142898 is an apocalyptic number.

815142898 is a deficient number, since it is larger than the sum of its proper divisors (407571452).

815142898 is a wasteful number, since it uses less digits than its factorization.

815142898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407571451.

The product of its digits is 184320, while the sum is 46.

The square root of 815142898 is about 28550.7074868557. The cubic root of 815142898 is about 934.1384527591.

The spelling of 815142898 in words is "eight hundred fifteen million, one hundred forty-two thousand, eight hundred ninety-eight".