2158265269 has 4 divisors (see below), whose sum is σ = 2160178060. Its totient is φ = 2156352480.

The previous prime is 2158265261. The next prime is 2158265281. The reversal of 2158265269 is 9625628512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 372104100 + 1786161169 = 19290^2 + 42263^2 .

It is a cyclic number.

It is not a de Polignac number, because 2158265269 - 2³ = 2158265261 is a prime.

It is a super-2 number, since 2×2158265269² = 9316217942743284722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158265261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954702 + ... + 956959.

It is an arithmetic number, because the mean of its divisors is an integer number (540044515).

Almost surely, 2^2158265269 is an apocalyptic number.

It is an amenable number.

2158265269 is a deficient number, since it is larger than the sum of its proper divisors (1912791).

2158265269 is a wasteful number, since it uses less digits than its factorization.

2158265269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912790.

The product of its digits is 518400, while the sum is 46.

The square root of 2158265269 is about 46457.1336718055. The cubic root of 2158265269 is about 1292.3146690558.

The spelling of 2158265269 in words is "two billion, one hundred fifty-eight million, two hundred sixty-five thousand, two hundred sixty-nine".