1015531625 has 32 divisors (see below), whose sum is σ = 1287277056. Its totient is φ = 799800000.

The previous prime is 1015531609. The next prime is 1015531667. The reversal of 1015531625 is 5261355101.

1015531625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1015531625 - 2⁴ = 1015531609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3265220 + ... + 3265530.

It is an arithmetic number, because the mean of its divisors is an integer number (40227408).

Almost surely, 2^1015531625 is an apocalyptic number.

It is an amenable number.

1015531625 is a deficient number, since it is larger than the sum of its proper divisors (271745431).

1015531625 is a wasteful number, since it uses less digits than its factorization.

1015531625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1015531625 is about 31867.4069387517. The cubic root of 1015531625 is about 1005.1506337581.

Adding to 1015531625 its reverse (5261355101), we get a palindrome (6276886726).

The spelling of 1015531625 in words is "one billion, fifteen million, five hundred thirty-one thousand, six hundred twenty-five".