1023545531 has 4 divisors (see below), whose sum is σ = 1023697200. Its totient is φ = 1023393864.

The previous prime is 1023545527. The next prime is 1023545573. The reversal of 1023545531 is 1355453201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1355453201 = 131 ⋅10346971.

It is a cyclic number.

It is not a de Polignac number, because 1023545531 - 2² = 1023545527 is a prime.

It is a super-2 number, since 2×1023545531² = 2095290908060143922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023545494 and 1023545503.

It is not an unprimeable number, because it can be changed into a prime (1023545521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65216 + ... + 79373.

It is an arithmetic number, because the mean of its divisors is an integer number (255924300).

Almost surely, 2^1023545531 is an apocalyptic number.

1023545531 is a deficient number, since it is larger than the sum of its proper divisors (151669).

1023545531 is an equidigital number, since it uses as much as digits as its factorization.

1023545531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151668.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1023545531 is about 31992.8981338046. The cubic root of 1023545531 is about 1007.7877045540.

Adding to 1023545531 its reverse (1355453201), we get a palindrome (2378998732).

The spelling of 1023545531 in words is "one billion, twenty-three million, five hundred forty-five thousand, five hundred thirty-one".