243261077 has 16 divisors (see below), whose sum is σ = 260290800. Its totient is φ = 226920960.

The previous prime is 243261059. The next prime is 243261079. The reversal of 243261077 is 770162342.

It can be written as a sum of positive squares in 8 ways, for example, as 2669956 + 240591121 = 1634^2 + 15511^2 .

It is a cyclic number.

It is not a de Polignac number, because 243261077 - 2⁶ = 243261013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243261079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128663 + ... + 130539.

It is an arithmetic number, because the mean of its divisors is an integer number (16268175).

Almost surely, 2^243261077 is an apocalyptic number.

It is an amenable number.

243261077 is a deficient number, since it is larger than the sum of its proper divisors (17029723).

243261077 is a wasteful number, since it uses less digits than its factorization.

243261077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 243261077 is about 15596.8290687563. The cubic root of 243261077 is about 624.2485492503.

The spelling of 243261077 in words is "two hundred forty-three million, two hundred sixty-one thousand, seventy-seven".