1051221563 has 12 divisors (see below), whose sum is σ = 1241408880. Its totient is φ = 871975440.

The previous prime is 1051221553. The next prime is 1051221583. The reversal of 1051221563 is 3651221501.

It is not a de Polignac number, because 1051221563 - 2¹⁰ = 1051220539 is a prime.

It is a super-2 number, since 2×1051221563² = 2210133549032325938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051221553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71408 + ... + 84861.

It is an arithmetic number, because the mean of its divisors is an integer number (103450740).

Almost surely, 2^1051221563 is an apocalyptic number.

1051221563 is a deficient number, since it is larger than the sum of its proper divisors (190187317).

1051221563 is an equidigital number, since it uses as much as digits as its factorization.

1051221563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156338 (or 156307 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1051221563 is about 32422.5471392980. The cubic root of 1051221563 is about 1016.7903603092.

The spelling of 1051221563 in words is "one billion, fifty-one million, two hundred twenty-one thousand, five hundred sixty-three".