2520093781 has 2 divisors, whose sum is σ = 2520093782. Its totient is φ = 2520093780.

The previous prime is 2520093773. The next prime is 2520093803. The reversal of 2520093781 is 1873900252.

2520093781 is nontrivially palindromic in base 6.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1502802756 + 1017291025 = 38766^2 + 31895^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520093781 - 2³ = 2520093773 is a prime.

It is a super-2 number, since 2×2520093781² = 12701745330069751922, 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 2520093781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520093701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260046890 + 1260046891.

It is an arithmetic number, because the mean of its divisors is an integer number (1260046891).

Almost surely, 2^2520093781 is an apocalyptic number.

It is an amenable number.

2520093781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520093781 is an equidigital number, since it uses as much as digits as its factorization.

2520093781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 2520093781 is about 50200.5356644727. The cubic root of 2520093781 is about 1360.8353037898.

The spelling of 2520093781 in words is "two billion, five hundred twenty million, ninety-three thousand, seven hundred eighty-one".