4001425531 has 4 divisors (see below), whose sum is σ = 4001704000. Its totient is φ = 4001147064.

The previous prime is 4001425513. The next prime is 4001425537. The reversal of 4001425531 is 1355241004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4001425531 - 2⁹ = 4001425019 is a prime.

It is a super-2 number, since 2×4001425531² = 32022812560277263922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4001425496 and 4001425505.

It is not an unprimeable number, because it can be changed into a prime (4001425537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116436 + ... + 146833.

It is an arithmetic number, because the mean of its divisors is an integer number (1000426000).

Almost surely, 2^4001425531 is an apocalyptic number.

4001425531 is a deficient number, since it is larger than the sum of its proper divisors (278469).

4001425531 is a wasteful number, since it uses less digits than its factorization.

4001425531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278468.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 4001425531 is about 63256.8220115428. The cubic root of 4001425531 is about 1587.5896036885.

Adding to 4001425531 its reverse (1355241004), we get a palindrome (5356666535).

The spelling of 4001425531 in words is "four billion, one million, four hundred twenty-five thousand, five hundred thirty-one".