2155218094 has 4 divisors (see below), whose sum is σ = 3232827144. Its totient is φ = 1077609046.

The previous prime is 2155218019. The next prime is 2155218101. The reversal of 2155218094 is 4908125512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538804522 + ... + 538804525.

It is an arithmetic number, because the mean of its divisors is an integer number (808206786).

Almost surely, 2^2155218094 is an apocalyptic number.

2155218094 is a deficient number, since it is larger than the sum of its proper divisors (1077609050).

2155218094 is a wasteful number, since it uses less digits than its factorization.

2155218094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077609049.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 2155218094 is about 46424.3265325411. The cubic root of 2155218094 is about 1291.7061921576.

The spelling of 2155218094 in words is "two billion, one hundred fifty-five million, two hundred eighteen thousand, ninety-four".