155953481 has 2 divisors, whose sum is σ = 155953482. Its totient is φ = 155953480.

The previous prime is 155953459. The next prime is 155953513. The reversal of 155953481 is 184359551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85729081 + 70224400 = 9259^2 + 8380^2 .

It is an emirp because it is prime and its reverse (184359551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155953481 - 2¹⁰ = 155952457 is a prime.

It is a super-2 number, since 2×155953481² = 48642976472034722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155953081) 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, 77976740 + 77976741.

It is an arithmetic number, because the mean of its divisors is an integer number (77976741).

Almost surely, 2^155953481 is an apocalyptic number.

It is an amenable number.

155953481 is a deficient number, since it is larger than the sum of its proper divisors (1).

155953481 is an equidigital number, since it uses as much as digits as its factorization.

155953481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 41.

The square root of 155953481 is about 12488.1336075492. The cubic root of 155953481 is about 538.2677469858.

The spelling of 155953481 in words is "one hundred fifty-five million, nine hundred fifty-three thousand, four hundred eighty-one".