1013217181 has 2 divisors, whose sum is σ = 1013217182. Its totient is φ = 1013217180.

The previous prime is 1013217169. The next prime is 1013217197. The reversal of 1013217181 is 1817123101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 847683225 + 165533956 = 29115^2 + 12866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013217181 - 2⁷ = 1013217053 is a prime.

It is a super-2 number, since 2×1013217181² = 2053218111747173522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013217131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506608590 + 506608591.

It is an arithmetic number, because the mean of its divisors is an integer number (506608591).

Almost surely, 2^1013217181 is an apocalyptic number.

It is an amenable number.

1013217181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013217181 is an equidigital number, since it uses as much as digits as its factorization.

1013217181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 25.

The square root of 1013217181 is about 31831.0725706816. The cubic root of 1013217181 is about 1004.3864578542.

The spelling of 1013217181 in words is "one billion, thirteen million, two hundred seventeen thousand, one hundred eighty-one".