199404051 has 32 divisors (see below), whose sum is σ = 332812800. Its totient is φ = 103169280.

The previous prime is 199404047. The next prime is 199404077. The reversal of 199404051 is 150404991.

199404051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199404051 - 2² = 199404047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (199404001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60535 + ... + 63743.

It is an arithmetic number, because the mean of its divisors is an integer number (10400400).

Almost surely, 2^199404051 is an apocalyptic number.

199404051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199404051 is a deficient number, since it is larger than the sum of its proper divisors (133408749).

199404051 is a wasteful number, since it uses less digits than its factorization.

199404051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 199404051 is about 14121.0499255544. The cubic root of 199404051 is about 584.2221146032. Note that the first 3 decimals are identical.

The spelling of 199404051 in words is "one hundred ninety-nine million, four hundred four thousand, fifty-one".