2520455491 has 2 divisors, whose sum is σ = 2520455492. Its totient is φ = 2520455490.

The previous prime is 2520455473. The next prime is 2520455519. The reversal of 2520455491 is 1945540252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2520455491 - 2¹⁹ = 2519931203 is a prime.

It is a super-2 number, since 2×2520455491² = 12705391764224102162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2520455491.

It is not a weakly prime, because it can be changed into another prime (2520455461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260227745 + 1260227746.

It is an arithmetic number, because the mean of its divisors is an integer number (1260227746).

Almost surely, 2^2520455491 is an apocalyptic number.

2520455491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520455491 is an equidigital number, since it uses as much as digits as its factorization.

2520455491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 2520455491 is about 50204.1381860101. The cubic root of 2520455491 is about 1360.9004077413.

The spelling of 2520455491 in words is "two billion, five hundred twenty million, four hundred fifty-five thousand, four hundred ninety-one".