1131543402 has 32 divisors (see below), whose sum is σ = 2553958080. Its totient is φ = 331067520.

The previous prime is 1131543383. The next prime is 1131543421. The reversal of 1131543402 is 2043451311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1131543383) and next prime (1131543421).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293683 + ... + 297510.

It is an arithmetic number, because the mean of its divisors is an integer number (79811190).

Almost surely, 2^1131543402 is an apocalyptic number.

1131543402 is an abundant number, since it is smaller than the sum of its proper divisors (1422414678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131543402 is a wasteful number, since it uses less digits than its factorization.

1131543402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591238.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1131543402 is about 33638.4215146906. The cubic root of 1131543402 is about 1042.0544331726.

Adding to 1131543402 its reverse (2043451311), we get a palindrome (3174994713).

The spelling of 1131543402 in words is "one billion, one hundred thirty-one million, five hundred forty-three thousand, four hundred two".