428516651 has 2 divisors, whose sum is σ = 428516652. Its totient is φ = 428516650.

The previous prime is 428516623. The next prime is 428516663. The reversal of 428516651 is 156615824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428516651 - 2²² = 424322347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (428516681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214258325 + 214258326.

It is an arithmetic number, because the mean of its divisors is an integer number (214258326).

Almost surely, 2^428516651 is an apocalyptic number.

428516651 is a deficient number, since it is larger than the sum of its proper divisors (1).

428516651 is an equidigital number, since it uses as much as digits as its factorization.

428516651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

The square root of 428516651 is about 20700.6437339519. The cubic root of 428516651 is about 753.9153179973.

The spelling of 428516651 in words is "four hundred twenty-eight million, five hundred sixteen thousand, six hundred fifty-one".