2156061293 has 2 divisors, whose sum is σ = 2156061294. Its totient is φ = 2156061292.

The previous prime is 2156061247. The next prime is 2156061317. The reversal of 2156061293 is 3921606512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1592568649 + 563492644 = 39907^2 + 23738^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156061293 - 2¹⁶ = 2155995757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156061493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078030646 + 1078030647.

It is an arithmetic number, because the mean of its divisors is an integer number (1078030647).

Almost surely, 2^2156061293 is an apocalyptic number.

It is an amenable number.

2156061293 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156061293 is an equidigital number, since it uses as much as digits as its factorization.

2156061293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 2156061293 is about 46433.4070793863. The cubic root of 2156061293 is about 1291.8746242006.

The spelling of 2156061293 in words is "two billion, one hundred fifty-six million, sixty-one thousand, two hundred ninety-three".