28210007131 has 4 divisors (see below), whose sum is σ = 28229030872. Its totient is φ = 28190983392.

The previous prime is 28210007041. The next prime is 28210007149. The reversal of 28210007131 is 13170001282.

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 28210007131 - 2⁷ = 28210007003 is a prime.

It is a super-2 number, since 2×28210007131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28210007096 and 28210007105.

It is not an unprimeable number, because it can be changed into a prime (28210007191) 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, 9509646 + ... + 9512611.

It is an arithmetic number, because the mean of its divisors is an integer number (7057257718).

Almost surely, 2^28210007131 is an apocalyptic number.

28210007131 is a deficient number, since it is larger than the sum of its proper divisors (19023741).

28210007131 is a wasteful number, since it uses less digits than its factorization.

28210007131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19023740.

The product of its (nonzero) digits is 672, while the sum is 25.

The spelling of 28210007131 in words is "twenty-eight billion, two hundred ten million, seven thousand, one hundred thirty-one".