1215053998 has 16 divisors (see below), whose sum is σ = 1858117680. Its totient is φ = 595742400.

The previous prime is 1215053963. The next prime is 1215053999. The reversal of 1215053998 is 8993505121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215053999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25338 + ... + 55426.

It is an arithmetic number, because the mean of its divisors is an integer number (116132355).

Almost surely, 2^1215053998 is an apocalyptic number.

1215053998 is a deficient number, since it is larger than the sum of its proper divisors (643063682).

1215053998 is a wasteful number, since it uses less digits than its factorization.

1215053998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30483.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 1215053998 is about 34857.6246752414. The cubic root of 1215053998 is about 1067.0837989420.

The spelling of 1215053998 in words is "one billion, two hundred fifteen million, fifty-three thousand, nine hundred ninety-eight".