51555202 has 8 divisors (see below), whose sum is σ = 77654412. Its totient is φ = 25670400.

The previous prime is 51555199. The next prime is 51555221. The reversal of 51555202 is 20255515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51538041 + 17161 = 7179^2 + 131^2 .

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

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, 52999 + ... + 53962.

Almost surely, 2^51555202 is an apocalyptic number.

51555202 is a deficient number, since it is larger than the sum of its proper divisors (26099210).

51555202 is a wasteful number, since it uses less digits than its factorization.

51555202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107204.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 51555202 is about 7180.1951226969. The cubic root of 51555202 is about 372.1838273244.

The spelling of 51555202 in words is "fifty-one million, five hundred fifty-five thousand, two hundred two".