1525222141 has 4 divisors (see below), whose sum is σ = 1525360284. Its totient is φ = 1525084000.

The previous prime is 1525222129. The next prime is 1525222147. The reversal of 1525222141 is 1412225251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1412225251 = 79 ⋅17876269.

It can be written as a sum of positive squares in 2 ways, for example, as 1524590116 + 632025 = 39046^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525222141 - 2²¹ = 1523124989 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50920 + ... + 75121.

It is an arithmetic number, because the mean of its divisors is an integer number (381340071).

Almost surely, 2^1525222141 is an apocalyptic number.

It is an amenable number.

1525222141 is a deficient number, since it is larger than the sum of its proper divisors (138143).

1525222141 is a wasteful number, since it uses less digits than its factorization.

1525222141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138142.

The product of its digits is 1600, while the sum is 25.

The square root of 1525222141 is about 39054.0925000185. The cubic root of 1525222141 is about 1151.0946454268.

Adding to 1525222141 its reverse (1412225251), we get a palindrome (2937447392).

The spelling of 1525222141 in words is "one billion, five hundred twenty-five million, two hundred twenty-two thousand, one hundred forty-one".