1133215511 has 4 divisors (see below), whose sum is σ = 1138968072. Its totient is φ = 1127462952.

The previous prime is 1133215487. The next prime is 1133215541. The reversal of 1133215511 is 1155123311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1155123311 = 73 ⋅15823607.

It is a cyclic number.

It is not a de Polignac number, because 1133215511 - 2¹⁴ = 1133199127 is a prime.

It is a super-2 number, since 2×1133215511² = 2568354788741982242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133215541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2875985 + ... + 2876378.

It is an arithmetic number, because the mean of its divisors is an integer number (284742018).

Almost surely, 2^1133215511 is an apocalyptic number.

1133215511 is a deficient number, since it is larger than the sum of its proper divisors (5752561).

1133215511 is an equidigital number, since it uses as much as digits as its factorization.

1133215511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752560.

The product of its digits is 450, while the sum is 23.

The square root of 1133215511 is about 33663.2664933158. The cubic root of 1133215511 is about 1042.5674702100.

Adding to 1133215511 its reverse (1155123311), we get a palindrome (2288338822).

The spelling of 1133215511 in words is "one billion, one hundred thirty-three million, two hundred fifteen thousand, five hundred eleven".