51025111005 has 32 divisors (see below), whose sum is σ = 89076953088. Its totient is φ = 24735297600.

The previous prime is 51025111003. The next prime is 51025111037. The reversal of 51025111005 is 50011152015.

It is not a de Polignac number, because 51025111005 - 2¹ = 51025111003 is a prime.

It is a super-2 number, since 2×51025111005² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51025111003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1111212 + ... + 1156218.

It is an arithmetic number, because the mean of its divisors is an integer number (2783654784).

Almost surely, 2^51025111005 is an apocalyptic number.

51025111005 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51025111005 is a deficient number, since it is larger than the sum of its proper divisors (38051842083).

51025111005 is a wasteful number, since it uses less digits than its factorization.

51025111005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51897.

The product of its (nonzero) digits is 250, while the sum is 21.

The spelling of 51025111005 in words is "fifty-one billion, twenty-five million, one hundred eleven thousand, five".