2521222544 has 10 divisors (see below), whose sum is σ = 4884868710. Its totient is φ = 1260611264.

The previous prime is 2521222541. The next prime is 2521222559. The reversal of 2521222544 is 4452221252.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1961426944 + 559795600 = 44288^2 + 23660^2 .

It is not an unprimeable number, because it can be changed into a prime (2521222541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78788189 + ... + 78788220.

It is an arithmetic number, because the mean of its divisors is an integer number (488486871).

Almost surely, 2^2521222544 is an apocalyptic number.

It is an amenable number.

2521222544 is a deficient number, since it is larger than the sum of its proper divisors (2363646166).

2521222544 is a wasteful number, since it uses less digits than its factorization.

2521222544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157576417 (or 157576411 counting only the distinct ones).

The product of its digits is 12800, while the sum is 29.

The square root of 2521222544 is about 50211.7769452546. The cubic root of 2521222544 is about 1361.0384485130.

Adding to 2521222544 its reverse (4452221252), we get a palindrome (6973443796).

The spelling of 2521222544 in words is "two billion, five hundred twenty-one million, two hundred twenty-two thousand, five hundred forty-four".