51154002511 has 4 divisors (see below), whose sum is σ = 51411058000. Its totient is φ = 50896947024.

The previous prime is 51154002479. The next prime is 51154002521. The reversal of 51154002511 is 11520045115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51154002511 - 2⁵ = 51154002479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51154002521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128527446 + ... + 128527843.

It is an arithmetic number, because the mean of its divisors is an integer number (12852764500).

Almost surely, 2^51154002511 is an apocalyptic number.

51154002511 is a deficient number, since it is larger than the sum of its proper divisors (257055489).

51154002511 is a wasteful number, since it uses less digits than its factorization.

51154002511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257055488.

The product of its (nonzero) digits is 1000, while the sum is 25.

Adding to 51154002511 its reverse (11520045115), we get a palindrome (62674047626).

The spelling of 51154002511 in words is "fifty-one billion, one hundred fifty-four million, two thousand, five hundred eleven".