51225541555 has 8 divisors (see below), whose sum is σ = 61474928400. Its totient is φ = 40977580896.

The previous prime is 51225541463. The next prime is 51225541613. The reversal of 51225541555 is 55514552215.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51225541555 - 2⁷ = 51225541427 is a prime.

It is a super-2 number, since 2×51225541555² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275865 + ... + 422554.

It is an arithmetic number, because the mean of its divisors is an integer number (7684366050).

Almost surely, 2^51225541555 is an apocalyptic number.

51225541555 is a deficient number, since it is larger than the sum of its proper divisors (10249386845).

51225541555 is a wasteful number, since it uses less digits than its factorization.

51225541555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713093.

The product of its digits is 250000, while the sum is 40.

The spelling of 51225541555 in words is "fifty-one billion, two hundred twenty-five million, five hundred forty-one thousand, five hundred fifty-five".