1153203915 has 32 divisors (see below), whose sum is σ = 1859383296. Its totient is φ = 610312320.

The previous prime is 1153203913. The next prime is 1153203983. The reversal of 1153203915 is 5193023511.

It is not a de Polignac number, because 1153203915 - 2¹ = 1153203913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1153203913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1491469 + ... + 1492241.

It is an arithmetic number, because the mean of its divisors is an integer number (58105728).

Almost surely, 2^1153203915 is an apocalyptic number.

1153203915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1153203915 is a deficient number, since it is larger than the sum of its proper divisors (706179381).

1153203915 is a wasteful number, since it uses less digits than its factorization.

1153203915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 1153203915 is about 33958.8562086534. The cubic root of 1153203915 is about 1048.6616099290.

The spelling of 1153203915 in words is "one billion, one hundred fifty-three million, two hundred three thousand, nine hundred fifteen".