2051553641 has 4 divisors (see below), whose sum is σ = 2122296900. Its totient is φ = 1980810384.

The previous prime is 2051553631. The next prime is 2051553653. The reversal of 2051553641 is 1463551502.

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 1747574416 + 303979225 = 41804^2 + 17435^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051553641 - 2⁶ = 2051553577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2051553598 and 2051553607.

It is not an unprimeable number, because it can be changed into a prime (2051553611) 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, 35371586 + ... + 35371643.

It is an arithmetic number, because the mean of its divisors is an integer number (530574225).

Almost surely, 2^2051553641 is an apocalyptic number.

It is an amenable number.

2051553641 is a deficient number, since it is larger than the sum of its proper divisors (70743259).

2051553641 is an equidigital number, since it uses as much as digits as its factorization.

2051553641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70743258.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 2051553641 is about 45294.0795358510. The cubic root of 2051553641 is about 1270.6549293171.

The spelling of 2051553641 in words is "two billion, fifty-one million, five hundred fifty-three thousand, six hundred forty-one".