1053231309 has 32 divisors (see below), whose sum is σ = 1738329600. Its totient is φ = 625786560.

The previous prime is 1053231299. The next prime is 1053231323. The reversal of 1053231309 is 9031323501.

It is a happy number.

It is not a de Polignac number, because 1053231309 - 2¹⁵ = 1053198541 is a prime.

It is a super-2 number, since 2×1053231309² = 2218592380515706962, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053231409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41557 + ... + 61914.

It is an arithmetic number, because the mean of its divisors is an integer number (54322800).

Almost surely, 2^1053231309 is an apocalyptic number.

It is an amenable number.

1053231309 is a deficient number, since it is larger than the sum of its proper divisors (685098291).

1053231309 is a wasteful number, since it uses less digits than its factorization.

1053231309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103522 (or 103516 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 1053231309 is about 32453.5253709054. The cubic root of 1053231309 is about 1017.4379210617.

The spelling of 1053231309 in words is "one billion, fifty-three million, two hundred thirty-one thousand, three hundred nine".