1131243154253 has 4 divisors (see below), whose sum is σ = 1134857349948. Its totient is φ = 1127628958560.

The previous prime is 1131243154199. The next prime is 1131243154297. The reversal of 1131243154253 is 3524513421311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69020222089 + 1062222932164 = 262717^2 + 1030642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131243154253 - 2²⁰ = 1131242105677 is a prime.

It is a super-2 number, since 2×1131243154253² (a number of 25 digits) 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 (1131243154453) 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, 1807097378 + ... + 1807098003.

It is an arithmetic number, because the mean of its divisors is an integer number (283714337487).

Almost surely, 2^{1131243154253} is an apocalyptic number.

It is an amenable number.

1131243154253 is a deficient number, since it is larger than the sum of its proper divisors (3614195695).

1131243154253 is an equidigital number, since it uses as much as digits as its factorization.

1131243154253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614195694.

The product of its digits is 43200, while the sum is 35.

Adding to 1131243154253 its reverse (3524513421311), we get a palindrome (4655756575564).

The spelling of 1131243154253 in words is "one trillion, one hundred thirty-one billion, two hundred forty-three million, one hundred fifty-four thousand, two hundred fifty-three".