51275057215 has 8 divisors (see below), whose sum is σ = 61531293888. Its totient is φ = 41019228960.

The previous prime is 51275057147. The next prime is 51275057231.

It is a happy number.

51275057215 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 51275057215 - 2¹⁹ = 51274532927 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 387789 + ... + 502921.

It is an arithmetic number, because the mean of its divisors is an integer number (7691411736).

Almost surely, 2^51275057215 is an apocalyptic number.

51275057215 is a deficient number, since it is larger than the sum of its proper divisors (10256236673).

51275057215 is a wasteful number, since it uses less digits than its factorization.

51275057215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204209.

The product of its (nonzero) digits is 122500, while the sum is 40.

It can be divided in two parts, 512750 and 57215, that added together give a palindrome (569965).

The spelling of 51275057215 in words is "fifty-one billion, two hundred seventy-five million, fifty-seven thousand, two hundred fifteen".