900531131 has 4 divisors (see below), whose sum is σ = 900666312. Its totient is φ = 900395952.

The previous prime is 900531083. The next prime is 900531133. The reversal of 900531131 is 131135009.

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 900531131 - 2⁶ = 900531067 is a prime.

It is a super-2 number, since 2×900531131² = 1621912635800278322, 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 = 900531097 and 900531106.

It is not an unprimeable number, because it can be changed into a prime (900531133) 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, 57050 + ... + 71103.

It is an arithmetic number, because the mean of its divisors is an integer number (225166578).

Almost surely, 2^900531131 is an apocalyptic number.

900531131 is a deficient number, since it is larger than the sum of its proper divisors (135181).

900531131 is a wasteful number, since it uses less digits than its factorization.

900531131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135180.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 900531131 is about 30008.8508776994. The cubic root of 900531131 is about 965.6792736795.

The spelling of 900531131 in words is "nine hundred million, five hundred thirty-one thousand, one hundred thirty-one".