2021471451 has 8 divisors (see below), whose sum is σ = 2994772560. Its totient is φ = 1347647616.

The previous prime is 2021471443. The next prime is 2021471461. The reversal of 2021471451 is 1541741202.

2021471451 is a `hidden beast` number, since 202 + 1 + 4 + 7 + 1 + 451 = 666.

It is not a de Polignac number, because 2021471451 - 2³ = 2021471443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 74869313 = 2021471451 / (2 + 0 + 2 + 1 + 4 + 7 + 1 + 4 + 5 + 1).

It is not an unprimeable number, because it can be changed into a prime (2021471401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37434630 + ... + 37434683.

It is an arithmetic number, because the mean of its divisors is an integer number (374346570).

Almost surely, 2^2021471451 is an apocalyptic number.

2021471451 is a deficient number, since it is larger than the sum of its proper divisors (973301109).

2021471451 is an equidigital number, since it uses as much as digits as its factorization.

2021471451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74869322 (or 74869316 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2021471451 is about 44960.7768060117. The cubic root of 2021471451 is about 1264.4137328240.

The spelling of 2021471451 in words is "two billion, twenty-one million, four hundred seventy-one thousand, four hundred fifty-one".