1020555263 has 16 divisors (see below), whose sum is σ = 1261725696. Its totient is φ = 803835360.

The previous prime is 1020555251. The next prime is 1020555281. The reversal of 1020555263 is 3625550201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1020555263 - 2⁸ = 1020555007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020555233) 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, 4853 + ... + 45438.

It is an arithmetic number, because the mean of its divisors is an integer number (78857856).

Almost surely, 2^1020555263 is an apocalyptic number.

1020555263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020555263 is a deficient number, since it is larger than the sum of its proper divisors (241170433).

1020555263 is a wasteful number, since it uses less digits than its factorization.

1020555263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50534.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1020555263 is about 31946.1306420668. The cubic root of 1020555263 is about 1006.8053366685.

The spelling of 1020555263 in words is "one billion, twenty million, five hundred fifty-five thousand, two hundred sixty-three".