51911198 has 8 divisors (see below), whose sum is σ = 79029192. Its totient is φ = 25568136.

The previous prime is 51911129. The next prime is 51911213. The reversal of 51911198 is 89111915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193565 + ... + 193832.

It is an arithmetic number, because the mean of its divisors is an integer number (9878649).

Almost surely, 2^51911198 is an apocalyptic number.

51911198 is a deficient number, since it is larger than the sum of its proper divisors (27117994).

51911198 is a wasteful number, since it uses less digits than its factorization.

51911198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387466.

The product of its digits is 3240, while the sum is 35.

The square root of 51911198 is about 7204.9426090705. The cubic root of 51911198 is about 373.0385238142.

The spelling of 51911198 in words is "fifty-one million, nine hundred eleven thousand, one hundred ninety-eight".