155422471 has 2 divisors, whose sum is σ = 155422472. Its totient is φ = 155422470.

The previous prime is 155422457. The next prime is 155422481. The reversal of 155422471 is 174224551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155422471 - 2⁵ = 155422439 is a prime.

It is a super-3 number, since 3×155422471³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155422411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77711235 + 77711236.

It is an arithmetic number, because the mean of its divisors is an integer number (77711236).

Almost surely, 2^155422471 is an apocalyptic number.

155422471 is a deficient number, since it is larger than the sum of its proper divisors (1).

155422471 is an equidigital number, since it uses as much as digits as its factorization.

155422471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 31.

The square root of 155422471 is about 12466.8548960835. The cubic root of 155422471 is about 537.6561317476.

It can be divided in two parts, 1554 and 22471, that added together give a square (24025 = 155²).

The spelling of 155422471 in words is "one hundred fifty-five million, four hundred twenty-two thousand, four hundred seventy-one".