215103615838 has 4 divisors (see below), whose sum is σ = 322655423760. Its totient is φ = 107551807918.

The previous prime is 215103615833. The next prime is 215103615847. The reversal of 215103615838 is 838516301512.

It is a happy number.

215103615838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 215103615794 and 215103615803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215103615833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53775903958 + ... + 53775903961.

It is an arithmetic number, because the mean of its divisors is an integer number (80663855940).

Almost surely, 2^215103615838 is an apocalyptic number.

215103615838 is a deficient number, since it is larger than the sum of its proper divisors (107551807922).

215103615838 is a wasteful number, since it uses less digits than its factorization.

215103615838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107551807921.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 215103615838 in words is "two hundred fifteen billion, one hundred three million, six hundred fifteen thousand, eight hundred thirty-eight".