815279053 has 4 divisors (see below), whose sum is σ = 837313660. Its totient is φ = 793244448.

The previous prime is 815279041. The next prime is 815279057. The reversal of 815279053 is 350972518.

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 618914884 + 196364169 = 24878^2 + 14013^2 .

It is a cyclic number.

It is not a de Polignac number, because 815279053 - 2⁵ = 815279021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 815278997 and 815279015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815279057) 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, 11017248 + ... + 11017321.

It is an arithmetic number, because the mean of its divisors is an integer number (209328415).

Almost surely, 2^815279053 is an apocalyptic number.

It is an amenable number.

815279053 is a deficient number, since it is larger than the sum of its proper divisors (22034607).

815279053 is a wasteful number, since it uses less digits than its factorization.

815279053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22034606.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 815279053 is about 28553.0918290822. The cubic root of 815279053 is about 934.1904602212.

The spelling of 815279053 in words is "eight hundred fifteen million, two hundred seventy-nine thousand, fifty-three".