51554220102 has 96 divisors (see below), whose sum is σ = 141891160320. Its totient is φ = 13138032960.

The previous prime is 51554220071. The next prime is 51554220103. The reversal of 51554220102 is 20102245515.

51554220102 is a `hidden beast` number, since 5 + 1 + 554 + 2 + 2 + 0 + 102 = 666.

It is a super-2 number, since 2×51554220102² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51554220103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277452 + ... + 424367.

It is an arithmetic number, because the mean of its divisors is an integer number (1478032920).

Almost surely, 2^51554220102 is an apocalyptic number.

51554220102 is an abundant number, since it is smaller than the sum of its proper divisors (90336940218).

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

51554220102 is a wasteful number, since it uses less digits than its factorization.

51554220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701898 (or 701895 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 51554220102 its reverse (20102245515), we get a palindrome (71656465617).

The spelling of 51554220102 in words is "fifty-one billion, five hundred fifty-four million, two hundred twenty thousand, one hundred two".