1000255521 has 16 divisors (see below), whose sum is σ = 1371986048. Its totient is φ = 647740800.

The previous prime is 1000255511. The next prime is 1000255523. The reversal of 1000255521 is 1255520001.

1000255521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1000255521 - 2¹¹ = 1000253473 is a prime.

It is a super-2 number, since 2×1000255521² = 2001022214581962882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1000255523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62901 + ... + 77181.

It is an arithmetic number, because the mean of its divisors is an integer number (85749128).

Almost surely, 2^1000255521 is an apocalyptic number.

It is an amenable number.

1000255521 is a deficient number, since it is larger than the sum of its proper divisors (371730527).

1000255521 is a wasteful number, since it uses less digits than its factorization.

1000255521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14952.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1000255521 is about 31626.8164853815. The cubic root of 1000255521 is about 1000.0851664131.

Adding to 1000255521 its reverse (1255520001), we get a palindrome (2255775522).

The spelling of 1000255521 in words is "one billion, two hundred fifty-five thousand, five hundred twenty-one".