1525530101 has 4 divisors (see below), whose sum is σ = 1539525900. Its totient is φ = 1511534304.

The previous prime is 1525530077. The next prime is 1525530107. The reversal of 1525530101 is 1010355251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 985897201 + 539632900 = 31399^2 + 23230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525530101 - 2¹⁰ = 1525529077 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 (1525530107) 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, 6997736 + ... + 6997953.

It is an arithmetic number, because the mean of its divisors is an integer number (384881475).

Almost surely, 2^1525530101 is an apocalyptic number.

It is an amenable number.

1525530101 is a deficient number, since it is larger than the sum of its proper divisors (13995799).

1525530101 is a wasteful number, since it uses less digits than its factorization.

1525530101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13995798.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1525530101 is about 39058.0350376206. The cubic root of 1525530101 is about 1151.1721133229.

Adding to 1525530101 its reverse (1010355251), we get a palindrome (2535885352).

The spelling of 1525530101 in words is "one billion, five hundred twenty-five million, five hundred thirty thousand, one hundred one".