2520657245 has 16 divisors (see below), whose sum is σ = 3103990848. Its totient is φ = 1963896960.

The previous prime is 2520657233. The next prime is 2520657253. The reversal of 2520657245 is 5427560252.

It is a happy number.

It is not a de Polignac number, because 2520657245 - 2²² = 2516462941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2520657199 and 2520657208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109862 + ... + 130808.

It is an arithmetic number, because the mean of its divisors is an integer number (193999428).

Almost surely, 2^2520657245 is an apocalyptic number.

It is an amenable number.

2520657245 is a deficient number, since it is larger than the sum of its proper divisors (583333603).

2520657245 is a wasteful number, since it uses less digits than its factorization.

2520657245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21580.

The product of its (nonzero) digits is 168000, while the sum is 38.

The square root of 2520657245 is about 50206.1474821560. The cubic root of 2520657245 is about 1360.9367186087.

The spelling of 2520657245 in words is "two billion, five hundred twenty million, six hundred fifty-seven thousand, two hundred forty-five".