2015653261 has 2 divisors, whose sum is σ = 2015653262. Its totient is φ = 2015653260.

The previous prime is 2015653217. The next prime is 2015653349. The reversal of 2015653261 is 1623565102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1224300100 + 791353161 = 34990^2 + 28131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2015653261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015654261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007826630 + 1007826631.

It is an arithmetic number, because the mean of its divisors is an integer number (1007826631).

Almost surely, 2^2015653261 is an apocalyptic number.

It is an amenable number.

2015653261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015653261 is an equidigital number, since it uses as much as digits as its factorization.

2015653261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2015653261 is about 44896.0272295890. The cubic root of 2015653261 is about 1263.1994905040.

The spelling of 2015653261 in words is "two billion, fifteen million, six hundred fifty-three thousand, two hundred sixty-one".