51405020214 has 32 divisors (see below), whose sum is σ = 104124380640. Its totient is φ = 16916815872.

The previous prime is 51405020209. The next prime is 51405020231. The reversal of 51405020214 is 41202050415.

It is a super-2 number, since 2×51405020214² (a number of 22 digits) 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 15 ways as a sum of consecutive naturals, for example, 130062 + ... + 346014.

It is an arithmetic number, because the mean of its divisors is an integer number (3253886895).

Almost surely, 2^51405020214 is an apocalyptic number.

51405020214 is an abundant number, since it is smaller than the sum of its proper divisors (52719360426).

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

51405020214 is a wasteful number, since it uses less digits than its factorization.

51405020214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216464.

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 51405020214 its reverse (41202050415), we get a palindrome (92607070629).

The spelling of 51405020214 in words is "fifty-one billion, four hundred five million, twenty thousand, two hundred fourteen".