51256611222 has 16 divisors (see below), whose sum is σ = 106970319360. Its totient is φ = 16342687592.

The previous prime is 51256611221. The next prime is 51256611223. The reversal of 51256611222 is 22211665215.

It is an interprime number because it is at equal distance from previous prime (51256611221) and next prime (51256611223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51256611221) 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, 185712222 + ... + 185712497.

It is an arithmetic number, because the mean of its divisors is an integer number (6685644960).

Almost surely, 2^51256611222 is an apocalyptic number.

51256611222 is an abundant number, since it is smaller than the sum of its proper divisors (55713708138).

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

51256611222 is a wasteful number, since it uses less digits than its factorization.

51256611222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371424747.

The product of its digits is 14400, while the sum is 33.

The spelling of 51256611222 in words is "fifty-one billion, two hundred fifty-six million, six hundred eleven thousand, two hundred twenty-two".