2520161535 has 16 divisors (see below), whose sum is σ = 4032927360. Its totient is φ = 1343863200.

The previous prime is 2520161531. The next prime is 2520161563. The reversal of 2520161535 is 5351610252.

It is a happy number.

It is not a de Polignac number, because 2520161535 - 2² = 2520161531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520161531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122760 + ... + 141810.

It is an arithmetic number, because the mean of its divisors is an integer number (252057960).

Almost surely, 2^2520161535 is an apocalyptic number.

2520161535 is a deficient number, since it is larger than the sum of its proper divisors (1512765825).

2520161535 is a wasteful number, since it uses less digits than its factorization.

2520161535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27878.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 2520161535 is about 50201.2104933736. The cubic root of 2520161535 is about 1360.8474992631.

Adding to 2520161535 its reverse (5351610252), we get a palindrome (7871771787).

It can be divided in two parts, 25201 and 61535, that added together give a triangular number (86736 = T₄₁₆).

The spelling of 2520161535 in words is "two billion, five hundred twenty million, one hundred sixty-one thousand, five hundred thirty-five".