28431081351 has 8 divisors (see below), whose sum is σ = 42120120560. Its totient is φ = 18954054216.

The previous prime is 28431081347. The next prime is 28431081389. The reversal of 28431081351 is 15318013482.

28431081351 is a `hidden beast` number, since 284 + 310 + 8 + 13 + 51 = 666.

It is not a de Polignac number, because 28431081351 - 2² = 28431081347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28431081331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526501480 + ... + 526501533.

It is an arithmetic number, because the mean of its divisors is an integer number (5265015070).

Almost surely, 2^28431081351 is an apocalyptic number.

28431081351 is a deficient number, since it is larger than the sum of its proper divisors (13689039209).

28431081351 is a wasteful number, since it uses less digits than its factorization.

28431081351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053003022 (or 1053003016 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 28431081351 in words is "twenty-eight billion, four hundred thirty-one million, eighty-one thousand, three hundred fifty-one".