51211111420152 has 32 divisors (see below), whose sum is σ = 142253087278800. Its totient is φ = 17070370473312.

The previous prime is 51211111420121. The next prime is 51211111420159. The reversal of 51211111420152 is 25102411111215.

51211111420152 is a `hidden beast` number, since 5 + 1 + 211 + 1 + 11 + 420 + 15 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51211111420159) 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, 118544239183 + ... + 118544239614.

Almost surely, 2^{51211111420152} is an apocalyptic number.

It is an amenable number.

51211111420152 is an abundant number, since it is smaller than the sum of its proper divisors (91041975858648).

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

51211111420152 is a wasteful number, since it uses less digits than its factorization.

51211111420152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237088478812 (or 237088478802 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 27.

Adding to 51211111420152 its reverse (25102411111215), we get a palindrome (76313522531367).

The spelling of 51211111420152 in words is "fifty-one trillion, two hundred eleven billion, one hundred eleven million, four hundred twenty thousand, one hundred fifty-two".