2525264721 has 64 divisors (see below), whose sum is σ = 4342947840. Its totient is φ = 1420459200.

The previous prime is 2525264719. The next prime is 2525264747. The reversal of 2525264721 is 1274625252.

2525264721 is a `hidden beast` number, since 2 + 5 + 2 + 5 + 2 + 647 + 2 + 1 = 666.

It is not a de Polignac number, because 2525264721 - 2¹ = 2525264719 is a prime.

It is a super-2 number, since 2×2525264721² = 12753923822254415682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2525264701) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5020156 + ... + 5020658.

It is an arithmetic number, because the mean of its divisors is an integer number (67858560).

Almost surely, 2^2525264721 is an apocalyptic number.

2525264721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2525264721 is a deficient number, since it is larger than the sum of its proper divisors (1817683119).

2525264721 is a wasteful number, since it uses less digits than its factorization.

2525264721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 877 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 2525264721 is about 50252.0121089693. The cubic root of 2525264721 is about 1361.7654266210.

Adding to 2525264721 its reverse (1274625252), we get a palindrome (3799889973).

The spelling of 2525264721 in words is "two billion, five hundred twenty-five million, two hundred sixty-four thousand, seven hundred twenty-one".