1531872001 has 4 divisors (see below), whose sum is σ = 1671133104. Its totient is φ = 1392610900.

The previous prime is 1531871981. The next prime is 1531872007. The reversal of 1531872001 is 1002781351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1531872001 - 2⁵ = 1531871969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1531872007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69630535 + ... + 69630556.

It is an arithmetic number, because the mean of its divisors is an integer number (417783276).

Almost surely, 2^1531872001 is an apocalyptic number.

1531872001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1531872001 is a deficient number, since it is larger than the sum of its proper divisors (139261103).

1531872001 is a wasteful number, since it uses less digits than its factorization.

1531872001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139261102.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1531872001 is about 39139.1364365644. The cubic root of 1531872001 is about 1152.7651169755.

The spelling of 1531872001 in words is "one billion, five hundred thirty-one million, eight hundred seventy-two thousand, one".