51801198 has 16 divisors (see below), whose sum is σ = 108107136. Its totient is φ = 16516280.

The previous prime is 51801181. The next prime is 51801241. The reversal of 51801198 is 89110815.

It is a super-2 number, since 2×51801198² = 5366728228470408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187548 + ... + 187823.

It is an arithmetic number, because the mean of its divisors is an integer number (6756696).

Almost surely, 2^51801198 is an apocalyptic number.

51801198 is an abundant number, since it is smaller than the sum of its proper divisors (56305938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51801198 is a wasteful number, since it uses less digits than its factorization.

51801198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375399.

The product of its (nonzero) digits is 2880, while the sum is 33.

The square root of 51801198 is about 7197.3049122571. The cubic root of 51801198 is about 372.7748475282.

The spelling of 51801198 in words is "fifty-one million, eight hundred one thousand, one hundred ninety-eight".