1533253440 has 56 divisors (see below), whose sum is σ = 4868082720. Its totient is φ = 408867328.

The previous prime is 1533253429. The next prime is 1533253441. The reversal of 1533253440 is 443523351.

It is a super-2 number, since 2×1533253440² = 4701732222543667200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1533253398 and 1533253407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1533253441) 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, 797610 + ... + 799529.

Almost surely, 2^1533253440 is an apocalyptic number.

1533253440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1533253440 is an abundant number, since it is smaller than the sum of its proper divisors (3334829280).

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

1533253440 is a wasteful number, since it uses less digits than its factorization.

1533253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597159 (or 1597149 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 1533253440 is about 39156.7802557871. The cubic root of 1533253440 is about 1153.1115332627. Note that the first 3 decimals are identical.

Adding to 1533253440 its reverse (443523351), we get a palindrome (1976776791).

The spelling of 1533253440 in words is "one billion, five hundred thirty-three million, two hundred fifty-three thousand, four hundred forty".