2158479157 has 2 divisors, whose sum is σ = 2158479158. Its totient is φ = 2158479156.

The previous prime is 2158479121. The next prime is 2158479163. The reversal of 2158479157 is 7519748512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2126962161 + 31516996 = 46119^2 + 5614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158479157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2158479157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158479457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079239578 + 1079239579.

It is an arithmetic number, because the mean of its divisors is an integer number (1079239579).

Almost surely, 2^2158479157 is an apocalyptic number.

It is an amenable number.

2158479157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158479157 is an equidigital number, since it uses as much as digits as its factorization.

2158479157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 49.

The square root of 2158479157 is about 46459.4356078504. The cubic root of 2158479157 is about 1292.3573578877.

The spelling of 2158479157 in words is "two billion, one hundred fifty-eight million, four hundred seventy-nine thousand, one hundred fifty-seven".