1151522440 has 32 divisors (see below), whose sum is σ = 2626424280. Its totient is φ = 454298112.

The previous prime is 1151522431. The next prime is 1151522443. The reversal of 1151522440 is 442251511.

It can be written as a sum of positive squares in 4 ways, for example, as 656281924 + 495240516 = 25618^2 + 22254^2 .

It is not an unprimeable number, because it can be changed into a prime (1151522443) 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, 194259 + ... + 200098.

Almost surely, 2^1151522440 is an apocalyptic number.

1151522440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151522440 is an abundant number, since it is smaller than the sum of its proper divisors (1474901840).

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

1151522440 is a wasteful number, since it uses less digits than its factorization.

1151522440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394441 (or 394437 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1151522440 is about 33934.0896444858. The cubic root of 1151522440 is about 1048.1516810349.

Adding to 1151522440 its reverse (442251511), we get a palindrome (1593773951).

The spelling of 1151522440 in words is "one billion, one hundred fifty-one million, five hundred twenty-two thousand, four hundred forty".