1131552021 has 8 divisors (see below), whose sum is σ = 1509845184. Its totient is φ = 753813440.

The previous prime is 1131552001. The next prime is 1131552047. The reversal of 1131552021 is 1202551311.

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

It is a cyclic number.

It is not a de Polignac number, because 1131552021 - 2⁷ = 1131551893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131552001) 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, 133860 + ... + 142061.

It is an arithmetic number, because the mean of its divisors is an integer number (188730648).

Almost surely, 2^1131552021 is an apocalyptic number.

It is an amenable number.

1131552021 is a deficient number, since it is larger than the sum of its proper divisors (378293163).

1131552021 is a wasteful number, since it uses less digits than its factorization.

1131552021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277291.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1131552021 is about 33638.5496268790. The cubic root of 1131552021 is about 1042.0570789525.

It can be divided in two parts, 11315 and 52021, that added together give a palindrome (63336).

The spelling of 1131552021 in words is "one billion, one hundred thirty-one million, five hundred fifty-two thousand, twenty-one".