2001522453 has 24 divisors (see below), whose sum is σ = 3267796320. Its totient is φ = 1083529440.

The previous prime is 2001522403. The next prime is 2001522463. The reversal of 2001522453 is 3542251002.

It is a de Polignac number, because none of the positive numbers 2^k-2001522453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001522403) 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, 355518 + ... + 361103.

It is an arithmetic number, because the mean of its divisors is an integer number (136158180).

Almost surely, 2^2001522453 is an apocalyptic number.

It is an amenable number.

2001522453 is a deficient number, since it is larger than the sum of its proper divisors (1266273867).

2001522453 is a wasteful number, since it uses less digits than its factorization.

2001522453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716657 (or 716650 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2001522453 is about 44738.3778539187. The cubic root of 2001522453 is about 1260.2406639061.

Adding to 2001522453 its reverse (3542251002), we get a palindrome (5543773455).

The spelling of 2001522453 in words is "two billion, one million, five hundred twenty-two thousand, four hundred fifty-three".