215435370949 has 2 divisors, whose sum is σ = 215435370950. Its totient is φ = 215435370948.

The previous prime is 215435370923. The next prime is 215435370967. The reversal of 215435370949 is 949073534512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156637850625 + 58797520324 = 395775^2 + 242482^2 .

It is a cyclic number.

It is not a de Polignac number, because 215435370949 - 2²³ = 215426982341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215435370896 and 215435370905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215435370149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107717685474 + 107717685475.

It is an arithmetic number, because the mean of its divisors is an integer number (107717685475).

Almost surely, 2^215435370949 is an apocalyptic number.

It is an amenable number.

215435370949 is a deficient number, since it is larger than the sum of its proper divisors (1).

215435370949 is an equidigital number, since it uses as much as digits as its factorization.

215435370949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 215435370949 in words is "two hundred fifteen billion, four hundred thirty-five million, three hundred seventy thousand, nine hundred forty-nine".