1023544431 has 128 divisors (see below), whose sum is σ = 1954355200. Its totient is φ = 521520768.

The previous prime is 1023544397. The next prime is 1023544439. The reversal of 1023544431 is 1344453201.

It is a happy number.

It is not a de Polignac number, because 1023544431 - 2¹⁵ = 1023511663 is a prime.

It is a super-2 number, since 2×1023544431² = 2095286404462227522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1023544395 and 1023544404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023544439) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7363560 + ... + 7363698.

It is an arithmetic number, because the mean of its divisors is an integer number (15268400).

Almost surely, 2^1023544431 is an apocalyptic number.

1023544431 is a deficient number, since it is larger than the sum of its proper divisors (930810769).

1023544431 is an equidigital number, since it uses as much as digits as its factorization.

1023544431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1023544431 is about 31992.8809424847. The cubic root of 1023544431 is about 1007.7873435321.

Adding to 1023544431 its reverse (1344453201), we get a palindrome (2367997632).

The spelling of 1023544431 in words is "one billion, twenty-three million, five hundred forty-four thousand, four hundred thirty-one".