2051553819 has 16 divisors (see below), whose sum is σ = 3129344768. Its totient is φ = 1171128672.

The previous prime is 2051553817. The next prime is 2051553851. The reversal of 2051553819 is 9183551502.

It is not a de Polignac number, because 2051553819 - 2¹ = 2051553817 is a prime.

It is a super-2 number, since 2×2051553819² = 8417746144506969522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051553811) 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, 28057 + ... + 69930.

It is an arithmetic number, because the mean of its divisors is an integer number (195584048).

Almost surely, 2^2051553819 is an apocalyptic number.

2051553819 is a deficient number, since it is larger than the sum of its proper divisors (1077790949).

2051553819 is an equidigital number, since it uses as much as digits as its factorization.

2051553819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98994.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 2051553819 is about 45294.0815007877. The cubic root of 2051553819 is about 1270.6549660659.

The spelling of 2051553819 in words is "two billion, fifty-one million, five hundred fifty-three thousand, eight hundred nineteen".