2051053409 has 4 divisors (see below), whose sum is σ = 2051686404. Its totient is φ = 2050420416.

The previous prime is 2051053387. The next prime is 2051053463. The reversal of 2051053409 is 9043501502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1472410384 + 578643025 = 38372^2 + 24055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051053409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051013409) 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, 311612 + ... + 318125.

It is an arithmetic number, because the mean of its divisors is an integer number (512921601).

Almost surely, 2^2051053409 is an apocalyptic number.

It is an amenable number.

2051053409 is a deficient number, since it is larger than the sum of its proper divisors (632995).

2051053409 is an equidigital number, since it uses as much as digits as its factorization.

2051053409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632994.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 2051053409 is about 45288.5571529940. The cubic root of 2051053409 is about 1270.5516459790.

The spelling of 2051053409 in words is "two billion, fifty-one million, fifty-three thousand, four hundred nine".