155122619 has 2 divisors, whose sum is σ = 155122620. Its totient is φ = 155122618.

The previous prime is 155122579. The next prime is 155122661. The reversal of 155122619 is 916221551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155122619 is a prime.

It is a super-2 number, since 2×155122619² = 48126053850838322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155152619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77561309 + 77561310.

It is an arithmetic number, because the mean of its divisors is an integer number (77561310).

Almost surely, 2^155122619 is an apocalyptic number.

155122619 is a deficient number, since it is larger than the sum of its proper divisors (1).

155122619 is an equidigital number, since it uses as much as digits as its factorization.

155122619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 32.

The square root of 155122619 is about 12454.8231219877. The cubic root of 155122619 is about 537.3101477684.

The spelling of 155122619 in words is "one hundred fifty-five million, one hundred twenty-two thousand, six hundred nineteen".