1525531424243 has 4 divisors (see below), whose sum is σ = 1525544911608. Its totient is φ = 1525517936880.

The previous prime is 1525531424237. The next prime is 1525531424257. The reversal of 1525531424243 is 3424241355251.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1525531424243 is a prime.

It is a super-2 number, since 2×1525531424243² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1525531424243.

It is not an unprimeable number, because it can be changed into a prime (1525531424213) 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, 6572573 + ... + 6800718.

It is an arithmetic number, because the mean of its divisors is an integer number (381386227902).

Almost surely, 2^{1525531424243} is an apocalyptic number.

1525531424243 is a deficient number, since it is larger than the sum of its proper divisors (13487365).

1525531424243 is a wasteful number, since it uses less digits than its factorization.

1525531424243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13487364.

The product of its digits is 576000, while the sum is 41.

Adding to 1525531424243 its reverse (3424241355251), we get a palindrome (4949772779494).

The spelling of 1525531424243 in words is "one trillion, five hundred twenty-five billion, five hundred thirty-one million, four hundred twenty-four thousand, two hundred forty-three".