159278551 has 2 divisors, whose sum is σ = 159278552. Its totient is φ = 159278550.

The previous prime is 159278549. The next prime is 159278573. The reversal of 159278551 is 155872951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 159278551 - 2¹ = 159278549 is a prime.

Together with 159278549, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 159278498 and 159278507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159278521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79639275 + 79639276.

It is an arithmetic number, because the mean of its divisors is an integer number (79639276).

Almost surely, 2^159278551 is an apocalyptic number.

159278551 is a deficient number, since it is larger than the sum of its proper divisors (1).

159278551 is an equidigital number, since it uses as much as digits as its factorization.

159278551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 43.

The square root of 159278551 is about 12620.5606452328. The cubic root of 159278551 is about 542.0663297135.

The spelling of 159278551 in words is "one hundred fifty-nine million, two hundred seventy-eight thousand, five hundred fifty-one".