6215091061 has 2 divisors, whose sum is σ = 6215091062. Its totient is φ = 6215091060.

The previous prime is 6215091049. The next prime is 6215091089. The reversal of 6215091061 is 1601905126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3599280036 + 2615811025 = 59994^2 + 51145^2 .

It is a cyclic number.

It is not a de Polignac number, because 6215091061 - 2⁷ = 6215090933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6215091011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3107545530 + 3107545531.

It is an arithmetic number, because the mean of its divisors is an integer number (3107545531).

Almost surely, 2^6215091061 is an apocalyptic number.

It is an amenable number.

6215091061 is a deficient number, since it is larger than the sum of its proper divisors (1).

6215091061 is an equidigital number, since it uses as much as digits as its factorization.

6215091061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 6215091061 is about 78835.8488316071. The cubic root of 6215091061 is about 1838.5798608967.

Adding to 6215091061 its reverse (1601905126), we get a palindrome (7816996187).

The spelling of 6215091061 in words is "six billion, two hundred fifteen million, ninety-one thousand, sixty-one".