28425020231 has 2 divisors, whose sum is σ = 28425020232. Its totient is φ = 28425020230.

The previous prime is 28425020203. The next prime is 28425020237. The reversal of 28425020231 is 13202052482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28425020231 - 2²⁶ = 28357911367 is a prime.

It is a super-2 number, since 2×28425020231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28425020194 and 28425020203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28425020237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212510115 + 14212510116.

It is an arithmetic number, because the mean of its divisors is an integer number (14212510116).

Almost surely, 2^28425020231 is an apocalyptic number.

28425020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

28425020231 is an equidigital number, since it uses as much as digits as its factorization.

28425020231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 28425020231 in words is "twenty-eight billion, four hundred twenty-five million, twenty thousand, two hundred thirty-one".