431520653 has 4 divisors (see below), whose sum is σ = 431652480. Its totient is φ = 431388828.

The previous prime is 431520629. The next prime is 431520659. The reversal of 431520653 is 356025134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 356025134 = 2 ⋅178012567.

It is a cyclic number.

It is not a de Polignac number, because 431520653 - 2¹² = 431516557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431520659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60875 + ... + 67592.

It is an arithmetic number, because the mean of its divisors is an integer number (107913120).

Almost surely, 2^431520653 is an apocalyptic number.

It is an amenable number.

431520653 is a deficient number, since it is larger than the sum of its proper divisors (131827).

431520653 is a wasteful number, since it uses less digits than its factorization.

431520653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131826.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 431520653 is about 20773.0751936250. The cubic root of 431520653 is about 755.6729248951.

Adding to 431520653 its reverse (356025134), we get a palindrome (787545787).

The spelling of 431520653 in words is "four hundred thirty-one million, five hundred twenty thousand, six hundred fifty-three".