1525135613 has 8 divisors (see below), whose sum is σ = 1579716096. Its totient is φ = 1470891600.

The previous prime is 1525135609. The next prime is 1525135621. The reversal of 1525135613 is 3165315251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1525135613 - 2² = 1525135609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1525135613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525135693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74873 + ... + 93038.

It is an arithmetic number, because the mean of its divisors is an integer number (197464512).

Almost surely, 2^1525135613 is an apocalyptic number.

It is an amenable number.

1525135613 is a deficient number, since it is larger than the sum of its proper divisors (54580483).

1525135613 is a wasteful number, since it uses less digits than its factorization.

1525135613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168235.

The product of its digits is 13500, while the sum is 32.

The square root of 1525135613 is about 39052.9846874730. The cubic root of 1525135613 is about 1151.0728772750.

The spelling of 1525135613 in words is "one billion, five hundred twenty-five million, one hundred thirty-five thousand, six hundred thirteen".