1023505242531 has 4 divisors (see below), whose sum is σ = 1364673656712. Its totient is φ = 682336828352.

The previous prime is 1023505242527. The next prime is 1023505242593. The reversal of 1023505242531 is 1352425053201.

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

It is a cyclic number.

It is not a de Polignac number, because 1023505242531 - 2² = 1023505242527 is a prime.

It is a super-2 number, since 2×1023505242531² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1023505242492 and 1023505242501.

It is not an unprimeable number, because it can be changed into a prime (1023505242511) 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, 170584207086 + ... + 170584207091.

It is an arithmetic number, because the mean of its divisors is an integer number (341168414178).

Almost surely, 2^{1023505242531} is an apocalyptic number.

1023505242531 is a deficient number, since it is larger than the sum of its proper divisors (341168414181).

1023505242531 is an equidigital number, since it uses as much as digits as its factorization.

1023505242531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341168414180.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 1023505242531 in words is "one trillion, twenty-three billion, five hundred five million, two hundred forty-two thousand, five hundred thirty-one".