1050216561 has 6 divisors (see below), whose sum is σ = 1516979490. Its totient is φ = 700144368.

The previous prime is 1050216553. The next prime is 1050216589. The reversal of 1050216561 is 1656120501.

It is a happy number.

1050216561 is a `hidden beast` number, since 1 + 0 + 5 + 0 + 2 + 1 + 656 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1004573025 + 45643536 = 31695^2 + 6756^2 .

It is not a de Polignac number, because 1050216561 - 2³ = 1050216553 is a prime.

It is a super-2 number, since 2×1050216561² = 2205909649997333442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1050216521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58345356 + ... + 58345373.

It is an arithmetic number, because the mean of its divisors is an integer number (252829915).

Almost surely, 2^1050216561 is an apocalyptic number.

It is an amenable number.

1050216561 is a deficient number, since it is larger than the sum of its proper divisors (466762929).

1050216561 is a wasteful number, since it uses less digits than its factorization.

1050216561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116690735 (or 116690732 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1050216561 is about 32407.0449285337. The cubic root of 1050216561 is about 1016.4662287769.

The spelling of 1050216561 in words is "one billion, fifty million, two hundred sixteen thousand, five hundred sixty-one".