1253203311 has 8 divisors (see below), whose sum is σ = 1758881920. Its totient is φ = 791496792.

The previous prime is 1253203291. The next prime is 1253203313. The reversal of 1253203311 is 1133023521.

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

It is not a de Polignac number, because 1253203311 - 2⁵ = 1253203279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253203313) 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, 10992955 + ... + 10993068.

It is an arithmetic number, because the mean of its divisors is an integer number (219860240).

Almost surely, 2^1253203311 is an apocalyptic number.

1253203311 is a deficient number, since it is larger than the sum of its proper divisors (505678609).

1253203311 is a wasteful number, since it uses less digits than its factorization.

1253203311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21986045.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1253203311 is about 35400.6117320026. The cubic root of 1253203311 is about 1078.1367366821.

Adding to 1253203311 its reverse (1133023521), we get a palindrome (2386226832).

The spelling of 1253203311 in words is "one billion, two hundred fifty-three million, two hundred three thousand, three hundred eleven".