157272019 has 2 divisors, whose sum is σ = 157272020. Its totient is φ = 157272018.

The previous prime is 157272007. The next prime is 157272043. The reversal of 157272019 is 910272751.

It is a weak prime.

It is an emirp because it is prime and its reverse (910272751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157272019 - 2²¹ = 155174867 is a prime.

It is a super-2 number, since 2×157272019² = 49468975920672722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157272079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78636009 + 78636010.

It is an arithmetic number, because the mean of its divisors is an integer number (78636010).

Almost surely, 2^157272019 is an apocalyptic number.

157272019 is a deficient number, since it is larger than the sum of its proper divisors (1).

157272019 is an equidigital number, since it uses as much as digits as its factorization.

157272019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 157272019 is about 12540.8141282773. The cubic root of 157272019 is about 539.7804537330.

The spelling of 157272019 in words is "one hundred fifty-seven million, two hundred seventy-two thousand, nineteen".