1532440643 has 4 divisors (see below), whose sum is σ = 1533851520. Its totient is φ = 1531029768.

The previous prime is 1532440633. The next prime is 1532440661. The reversal of 1532440643 is 3460442351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3460442351 = 47 ⋅73626433.

It is a cyclic number.

It is not a de Polignac number, because 1532440643 - 2¹⁴ = 1532424259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1532440633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703808 + ... + 705981.

It is an arithmetic number, because the mean of its divisors is an integer number (383462880).

Almost surely, 2^1532440643 is an apocalyptic number.

1532440643 is a deficient number, since it is larger than the sum of its proper divisors (1410877).

1532440643 is a wasteful number, since it uses less digits than its factorization.

1532440643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410876.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 1532440643 is about 39146.4001282366. The cubic root of 1532440643 is about 1152.9077375878.

Adding to 1532440643 its reverse (3460442351), we get a palindrome (4992882994).

The spelling of 1532440643 in words is "one billion, five hundred thirty-two million, four hundred forty thousand, six hundred forty-three".