1151533251 has 24 divisors (see below), whose sum is σ = 1831512384. Its totient is φ = 691370160.

The previous prime is 1151533241. The next prime is 1151533307. The reversal of 1151533251 is 1523351511.

It is not a de Polignac number, because 1151533251 - 2¹³ = 1151525059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1151533211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43761 + ... + 64946.

It is an arithmetic number, because the mean of its divisors is an integer number (76313016).

Almost surely, 2^1151533251 is an apocalyptic number.

1151533251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1151533251 is a deficient number, since it is larger than the sum of its proper divisors (679979133).

1151533251 is a wasteful number, since it uses less digits than its factorization.

1151533251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108831 (or 108828 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 1151533251 is about 33934.2489382040. The cubic root of 1151533251 is about 1048.1549611946.

Adding to 1151533251 its reverse (1523351511), we get a palindrome (2674884762).

The spelling of 1151533251 in words is "one billion, one hundred fifty-one million, five hundred thirty-three thousand, two hundred fifty-one".