2054220521 has 2 divisors, whose sum is σ = 2054220522. Its totient is φ = 2054220520.

The previous prime is 2054220479. The next prime is 2054220541. The reversal of 2054220521 is 1250224502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1976780521 + 77440000 = 44461^2 + 8800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2054220521 - 2²² = 2050026217 is a prime.

It is a super-2 number, since 2×2054220521² = 8439643897795022882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2054220541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1027110260 + 1027110261.

It is an arithmetic number, because the mean of its divisors is an integer number (1027110261).

Almost surely, 2^2054220521 is an apocalyptic number.

It is an amenable number.

2054220521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2054220521 is an equidigital number, since it uses as much as digits as its factorization.

2054220521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 2054220521 is about 45323.5095838793. The cubic root of 2054220521 is about 1271.2052792010.

The spelling of 2054220521 in words is "two billion, fifty-four million, two hundred twenty thousand, five hundred twenty-one".