1253633155 has 8 divisors (see below), whose sum is σ = 1525548384. Its totient is φ = 988780800.

The previous prime is 1253633113. The next prime is 1253633177. The reversal of 1253633155 is 5513363521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1253633155 - 2⁹ = 1253632643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253633155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1765326 + ... + 1766035.

It is an arithmetic number, because the mean of its divisors is an integer number (190693548).

Almost surely, 2^1253633155 is an apocalyptic number.

1253633155 is a deficient number, since it is larger than the sum of its proper divisors (271915229).

1253633155 is an equidigital number, since it uses as much as digits as its factorization.

1253633155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531437.

The product of its digits is 40500, while the sum is 34.

The square root of 1253633155 is about 35406.6823495227. The cubic root of 1253633155 is about 1078.2599882005.

Adding to 1253633155 its reverse (5513363521), we get a palindrome (6766996676).

The spelling of 1253633155 in words is "one billion, two hundred fifty-three million, six hundred thirty-three thousand, one hundred fifty-five".