2051457129 has 12 divisors (see below), whose sum is σ = 3065396100. Its totient is φ = 1320477984.

The previous prime is 2051457103. The next prime is 2051457137. The reversal of 2051457129 is 9217541502.

It can be written as a sum of positive squares in 2 ways, for example, as 1037162025 + 1014295104 = 32205^2 + 31848^2 .

It is not a de Polignac number, because 2051457129 - 2¹⁶ = 2051391593 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2051457093 and 2051457102.

It is not an unprimeable number, because it can be changed into a prime (2051457139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3929734 + ... + 3930255.

It is an arithmetic number, because the mean of its divisors is an integer number (255449675).

Almost surely, 2^2051457129 is an apocalyptic number.

2051457129 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2051457129 is a deficient number, since it is larger than the sum of its proper divisors (1013938971).

2051457129 is a wasteful number, since it uses less digits than its factorization.

2051457129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7860024 (or 7860021 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 2051457129 is about 45293.0141302166. The cubic root of 2051457129 is about 1270.6350037074.

The spelling of 2051457129 in words is "two billion, fifty-one million, four hundred fifty-seven thousand, one hundred twenty-nine".