158120251 has 2 divisors, whose sum is σ = 158120252. Its totient is φ = 158120250.

The previous prime is 158120219. The next prime is 158120257. The reversal of 158120251 is 152021851.

It is a strong prime.

It is an emirp because it is prime and its reverse (152021851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158120251 - 2⁵ = 158120219 is a prime.

It is not a weakly prime, because it can be changed into another prime (158120257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79060125 + 79060126.

It is an arithmetic number, because the mean of its divisors is an integer number (79060126).

Almost surely, 2^158120251 is an apocalyptic number.

158120251 is a deficient number, since it is larger than the sum of its proper divisors (1).

158120251 is an equidigital number, since it uses as much as digits as its factorization.

158120251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 158120251 is about 12574.5875081451. The cubic root of 158120251 is about 540.7491328709.

It can be divided in two parts, 158 and 120251, that added together give a square (120409 = 347²).

The spelling of 158120251 in words is "one hundred fifty-eight million, one hundred twenty thousand, two hundred fifty-one".