1225199519 has 2 divisors, whose sum is σ = 1225199520. Its totient is φ = 1225199518.

The previous prime is 1225199513. The next prime is 1225199533. The reversal of 1225199519 is 9159915221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225199519 - 2¹⁶ = 1225133983 is a prime.

It is a super-2 number, since 2×1225199519² = 3002227722715662722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1225199519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225199513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612599759 + 612599760.

It is an arithmetic number, because the mean of its divisors is an integer number (612599760).

Almost surely, 2^1225199519 is an apocalyptic number.

1225199519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225199519 is an equidigital number, since it uses as much as digits as its factorization.

1225199519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 44.

The square root of 1225199519 is about 35002.8501553802. The cubic root of 1225199519 is about 1070.0455679781.

The spelling of 1225199519 in words is "one billion, two hundred twenty-five million, one hundred ninety-nine thousand, five hundred nineteen".