115067821 has 4 divisors (see below), whose sum is σ = 125528544. Its totient is φ = 104607100.

The previous prime is 115067809. The next prime is 115067831. The reversal of 115067821 is 128760511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115067821 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 (115067801) 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, 5230345 + ... + 5230366.

It is an arithmetic number, because the mean of its divisors is an integer number (31382136).

Almost surely, 2^115067821 is an apocalyptic number.

115067821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115067821 is a deficient number, since it is larger than the sum of its proper divisors (10460723).

115067821 is a wasteful number, since it uses less digits than its factorization.

115067821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10460722.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 115067821 is about 10726.9669991102. The cubic root of 115067821 is about 486.3899913472.

The spelling of 115067821 in words is "one hundred fifteen million, sixty-seven thousand, eight hundred twenty-one".