155402419 has 2 divisors, whose sum is σ = 155402420. Its totient is φ = 155402418.

The previous prime is 155402399. The next prime is 155402447. The reversal of 155402419 is 914204551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155402419 - 2⁹ = 155401907 is a prime.

It is a super-2 number, since 2×155402419² = 48299823662103122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155402719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77701209 + 77701210.

It is an arithmetic number, because the mean of its divisors is an integer number (77701210).

Almost surely, 2^155402419 is an apocalyptic number.

155402419 is a deficient number, since it is larger than the sum of its proper divisors (1).

155402419 is an equidigital number, since it uses as much as digits as its factorization.

155402419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 155402419 is about 12466.0506576863. The cubic root of 155402419 is about 537.6330086553.

The spelling of 155402419 in words is "one hundred fifty-five million, four hundred two thousand, four hundred nineteen".