51025002105 has 64 divisors (see below), whose sum is σ = 101822312448. Its totient is φ = 21197410560.

The previous prime is 51025002103. The next prime is 51025002131. The reversal of 51025002105 is 50120052015.

It is not a de Polignac number, because 51025002105 - 2¹ = 51025002103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51025002103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3993387 + ... + 4006143.

It is an arithmetic number, because the mean of its divisors is an integer number (1590973632).

Almost surely, 2^51025002105 is an apocalyptic number.

51025002105 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51025002105 is a deficient number, since it is larger than the sum of its proper divisors (50797310343).

51025002105 is a wasteful number, since it uses less digits than its factorization.

51025002105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16246.

The product of its (nonzero) digits is 500, while the sum is 21.

The spelling of 51025002105 in words is "fifty-one billion, twenty-five million, two thousand, one hundred five".