1525222140 has 192 divisors, whose sum is σ = 4842391680. Its totient is φ = 356106240.

The previous prime is 1525222129. The next prime is 1525222147. The reversal of 1525222140 is 412225251.

It is a self number, because there is not a number n which added to its sum of digits gives 1525222140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525222147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1182616 + ... + 1183904.

It is an arithmetic number, because the mean of its divisors is an integer number (25220790).

Almost surely, 2^1525222140 is an apocalyptic number.

1525222140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1525222140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2421195840).

1525222140 is an abundant number, since it is smaller than the sum of its proper divisors (3317169540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1525222140 is a wasteful number, since it uses less digits than its factorization.

1525222140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1525222140 is about 39054.0924872157. The cubic root of 1525222140 is about 1151.0946451752.

Adding to 1525222140 its reverse (412225251), we get a palindrome (1937447391).

The spelling of 1525222140 in words is "one billion, five hundred twenty-five million, two hundred twenty-two thousand, one hundred forty".