1531985001 has 16 divisors (see below), whose sum is σ = 2181250560. Its totient is φ = 954293760.

The previous prime is 1531984999. The next prime is 1531985017. The reversal of 1531985001 is 1005891351.

It is not a de Polignac number, because 1531985001 - 2¹ = 1531984999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1531985501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281320 + ... + 286713.

It is an arithmetic number, because the mean of its divisors is an integer number (136328160).

Almost surely, 2^1531985001 is an apocalyptic number.

It is an amenable number.

1531985001 is a deficient number, since it is larger than the sum of its proper divisors (649265559).

1531985001 is a wasteful number, since it uses less digits than its factorization.

1531985001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568096.

The product of its (nonzero) digits is 5400, while the sum is 33.

The square root of 1531985001 is about 39140.5799778184. The cubic root of 1531985001 is about 1152.7934612182.

The spelling of 1531985001 in words is "one billion, five hundred thirty-one million, nine hundred eighty-five thousand, one".