1051891520 has 56 divisors (see below), whose sum is σ = 2512637088. Its totient is φ = 419443200.

The previous prime is 1051891487. The next prime is 1051891549. The reversal of 1051891520 is 251981501.

1051891520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1051891520² = 2212951539695820800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100955 + ... + 110885.

Almost surely, 2^1051891520 is an apocalyptic number.

1051891520 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 1051891520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1256318544).

1051891520 is an abundant number, since it is smaller than the sum of its proper divisors (1460745568).

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

1051891520 is an equidigital number, since it uses as much as digits as its factorization.

1051891520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10279 (or 10269 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 32.

The square root of 1051891520 is about 32432.8771465006. The cubic root of 1051891520 is about 1017.0063189554.

The spelling of 1051891520 in words is "one billion, fifty-one million, eight hundred ninety-one thousand, five hundred twenty".