1131553423 has 48 divisors (see below), whose sum is σ = 1557287424. Its totient is φ = 808194240.

The previous prime is 1131553369. The next prime is 1131553433. The reversal of 1131553423 is 3243551311.

It is a happy number.

It is not a de Polignac number, because 1131553423 - 2⁹ = 1131552911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131553391 and 1131553400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131553433) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1169686 + ... + 1170652.

It is an arithmetic number, because the mean of its divisors is an integer number (32443488).

Almost surely, 2^1131553423 is an apocalyptic number.

1131553423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1131553423 is a deficient number, since it is larger than the sum of its proper divisors (425734001).

1131553423 is a wasteful number, since it uses less digits than its factorization.

1131553423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1165 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 1131553423 is about 33638.5704660588. The cubic root of 1131553423 is about 1042.0575093240.

The spelling of 1131553423 in words is "one billion, one hundred thirty-one million, five hundred fifty-three thousand, four hundred twenty-three".