1055899581 has 8 divisors (see below), whose sum is σ = 1535853984. Its totient is φ = 639939120.

The previous prime is 1055899567. The next prime is 1055899583. The reversal of 1055899581 is 1859985501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1055899581 - 2⁶ = 1055899517 is a prime.

It is a super-2 number, since 2×1055899581² = 2229847850311951122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055899583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15998446 + ... + 15998511.

It is an arithmetic number, because the mean of its divisors is an integer number (191981748).

Almost surely, 2^1055899581 is an apocalyptic number.

1055899581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1055899581 is a deficient number, since it is larger than the sum of its proper divisors (479954403).

1055899581 is a wasteful number, since it uses less digits than its factorization.

1055899581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31996971.

The product of its (nonzero) digits is 648000, while the sum is 51.

The square root of 1055899581 is about 32494.6084912559. The cubic root of 1055899581 is about 1018.2963940112.

The spelling of 1055899581 in words is "one billion, fifty-five million, eight hundred ninety-nine thousand, five hundred eighty-one".