272381521 has 2 divisors, whose sum is σ = 272381522. Its totient is φ = 272381520.

The previous prime is 272381519. The next prime is 272381533. The reversal of 272381521 is 125183272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267780496 + 4601025 = 16364^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 272381521 - 2¹ = 272381519 is a prime.

Together with 272381519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (272381561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136190760 + 136190761.

It is an arithmetic number, because the mean of its divisors is an integer number (136190761).

Almost surely, 2^272381521 is an apocalyptic number.

It is an amenable number.

272381521 is a deficient number, since it is larger than the sum of its proper divisors (1).

272381521 is an equidigital number, since it uses as much as digits as its factorization.

272381521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 272381521 is about 16503.9850036287. The cubic root of 272381521 is about 648.2251549862.

The spelling of 272381521 in words is "two hundred seventy-two million, three hundred eighty-one thousand, five hundred twenty-one".