2520434857 has 4 divisors (see below), whose sum is σ = 2588554756. Its totient is φ = 2452314960.

The previous prime is 2520434849. The next prime is 2520434867. The reversal of 2520434857 is 7584340252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2021761296 + 498673561 = 44964^2 + 22331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520434857 - 2³ = 2520434849 is a prime.

It is a super-2 number, since 2×2520434857² = 12705183736761220898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520434837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34059894 + ... + 34059967.

It is an arithmetic number, because the mean of its divisors is an integer number (647138689).

Almost surely, 2^2520434857 is an apocalyptic number.

It is an amenable number.

2520434857 is a deficient number, since it is larger than the sum of its proper divisors (68119899).

2520434857 is an equidigital number, since it uses as much as digits as its factorization.

2520434857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68119898.

The product of its (nonzero) digits is 268800, while the sum is 40.

The square root of 2520434857 is about 50203.9326846015. The cubic root of 2520434857 is about 1360.8966940084.

The spelling of 2520434857 in words is "two billion, five hundred twenty million, four hundred thirty-four thousand, eight hundred fifty-seven".