428095531 has 2 divisors, whose sum is σ = 428095532. Its totient is φ = 428095530.

The previous prime is 428095519. The next prime is 428095541. The reversal of 428095531 is 135590824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428095531 - 2¹¹ = 428093483 is a prime.

It is a super-2 number, since 2×428095531² = 366531567324343922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (428095541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214047765 + 214047766.

It is an arithmetic number, because the mean of its divisors is an integer number (214047766).

Almost surely, 2^428095531 is an apocalyptic number.

428095531 is a deficient number, since it is larger than the sum of its proper divisors (1).

428095531 is an equidigital number, since it uses as much as digits as its factorization.

428095531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 428095531 is about 20690.4695693452. The cubic root of 428095531 is about 753.6682697378.

The spelling of 428095531 in words is "four hundred twenty-eight million, ninety-five thousand, five hundred thirty-one".