51051005499 has 16 divisors (see below), whose sum is σ = 75668655104. Its totient is φ = 30402583200.

The previous prime is 51051005483. The next prime is 51051005501. The reversal of 51051005499 is 99450015015.

51051005499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51051005499 - 2⁴ = 51051005483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51051005429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21111697 + ... + 21114114.

It is an arithmetic number, because the mean of its divisors is an integer number (4729290944).

Almost surely, 2^51051005499 is an apocalyptic number.

51051005499 is a deficient number, since it is larger than the sum of its proper divisors (24617649605).

51051005499 is a wasteful number, since it uses less digits than its factorization.

51051005499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42225858.

The product of its (nonzero) digits is 40500, while the sum is 39.

The spelling of 51051005499 in words is "fifty-one billion, fifty-one million, five thousand, four hundred ninety-nine".