1151531422 has 4 divisors (see below), whose sum is σ = 1727297136. Its totient is φ = 575765710.

The previous prime is 1151531399. The next prime is 1151531429. The reversal of 1151531422 is 2241351511.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151531429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287882854 + ... + 287882857.

It is an arithmetic number, because the mean of its divisors is an integer number (431824284).

Almost surely, 2^1151531422 is an apocalyptic number.

1151531422 is a deficient number, since it is larger than the sum of its proper divisors (575765714).

1151531422 is an equidigital number, since it uses as much as digits as its factorization.

1151531422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575765713.

The product of its digits is 1200, while the sum is 25.

The square root of 1151531422 is about 33934.2219890187. The cubic root of 1151531422 is about 1048.1544062601.

Adding to 1151531422 its reverse (2241351511), we get a palindrome (3392882933).

The spelling of 1151531422 in words is "one billion, one hundred fifty-one million, five hundred thirty-one thousand, four hundred twenty-two".