2157548198 has 16 divisors (see below), whose sum is σ = 3486487536. Its totient is φ = 995443680.

The previous prime is 2157548191. The next prime is 2157548201. The reversal of 2157548198 is 8918457512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157548191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70865 + ... + 96627.

It is an arithmetic number, because the mean of its divisors is an integer number (217905471).

Almost surely, 2^2157548198 is an apocalyptic number.

2157548198 is a deficient number, since it is larger than the sum of its proper divisors (1328939338).

2157548198 is a wasteful number, since it uses less digits than its factorization.

2157548198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28999.

The product of its digits is 806400, while the sum is 50.

The square root of 2157548198 is about 46449.4154753319. The cubic root of 2157548198 is about 1292.1715318749.

The spelling of 2157548198 in words is "two billion, one hundred fifty-seven million, five hundred forty-eight thousand, one hundred ninety-eight".