157219819 has 2 divisors, whose sum is σ = 157219820. Its totient is φ = 157219818.

The previous prime is 157219709. The next prime is 157219861. The reversal of 157219819 is 918912751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157219819 - 2⁷ = 157219691 is a prime.

It is a super-2 number, since 2×157219819² = 49436142972785522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157219019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78609909 + 78609910.

It is an arithmetic number, because the mean of its divisors is an integer number (78609910).

Almost surely, 2^157219819 is an apocalyptic number.

157219819 is a deficient number, since it is larger than the sum of its proper divisors (1).

157219819 is an equidigital number, since it uses as much as digits as its factorization.

157219819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 43.

The square root of 157219819 is about 12538.7327509601. The cubic root of 157219819 is about 539.7207277928.

The spelling of 157219819 in words is "one hundred fifty-seven million, two hundred nineteen thousand, eight hundred nineteen".