1051543320 has 128 divisors (see below), whose sum is σ = 3247957440. Its totient is φ = 272230400.

The previous prime is 1051543301. The next prime is 1051543321. The reversal of 1051543320 is 233451501.

It is a super-2 number, since 2×1051543320² = 2211486707673244800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051543321) 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, 641542 + ... + 643178.

Almost surely, 2^1051543320 is an apocalyptic number.

1051543320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1051543320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1623978720).

1051543320 is an abundant number, since it is smaller than the sum of its proper divisors (2196414120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1051543320 is a wasteful number, since it uses less digits than its factorization.

1051543320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805 (or 1801 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1051543320 is about 32427.5086924666. The cubic root of 1051543320 is about 1016.8940891691.

Adding to 1051543320 its reverse (233451501), we get a palindrome (1284994821).

It can be divided in two parts, 10515 and 43320, that added together give a palindrome (53835).

The spelling of 1051543320 in words is "one billion, fifty-one million, five hundred forty-three thousand, three hundred twenty".