2051351623 has 16 divisors (see below), whose sum is σ = 2213646336. Its totient is φ = 1895382720.

The previous prime is 2051351581. The next prime is 2051351633. The reversal of 2051351623 is 3261531502.

It is a cyclic number.

It is not a de Polignac number, because 2051351623 - 2⁹ = 2051351111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2051351591 and 2051351600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051351633) 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, 437590 + ... + 442252.

It is an arithmetic number, because the mean of its divisors is an integer number (138352896).

Almost surely, 2^2051351623 is an apocalyptic number.

2051351623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2051351623 is a deficient number, since it is larger than the sum of its proper divisors (162294713).

2051351623 is a wasteful number, since it uses less digits than its factorization.

2051351623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2051351623 is about 45291.8494102416. The cubic root of 2051351623 is about 1270.6132205054.

The spelling of 2051351623 in words is "two billion, fifty-one million, three hundred fifty-one thousand, six hundred twenty-three".