1535131725 has 12 divisors (see below), whose sum is σ = 2538084576. Its totient is φ = 818736880.

The previous prime is 1535131709. The next prime is 1535131727. The reversal of 1535131725 is 5271315351.

It is not a de Polignac number, because 1535131725 - 2⁴ = 1535131709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1535131727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10234137 + ... + 10234286.

It is an arithmetic number, because the mean of its divisors is an integer number (211507048).

Almost surely, 2^1535131725 is an apocalyptic number.

1535131725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1535131725 is a deficient number, since it is larger than the sum of its proper divisors (1002952851).

1535131725 is a wasteful number, since it uses less digits than its factorization.

1535131725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20468436 (or 20468431 counting only the distinct ones).

The product of its digits is 15750, while the sum is 33.

The square root of 1535131725 is about 39180.7570753808. The cubic root of 1535131725 is about 1153.5822074122.

The spelling of 1535131725 in words is "one billion, five hundred thirty-five million, one hundred thirty-one thousand, seven hundred twenty-five".