155224401523 has 2 divisors, whose sum is σ = 155224401524. Its totient is φ = 155224401522.

The previous prime is 155224401473. The next prime is 155224401539. The reversal of 155224401523 is 325104422551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155224401523 - 2⁹ = 155224401011 is a prime.

It is a super-2 number, since 2×155224401523² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155224401583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77612200761 + 77612200762.

It is an arithmetic number, because the mean of its divisors is an integer number (77612200762).

Almost surely, 2^155224401523 is an apocalyptic number.

155224401523 is a deficient number, since it is larger than the sum of its proper divisors (1).

155224401523 is an equidigital number, since it uses as much as digits as its factorization.

155224401523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 155224401523 in words is "one hundred fifty-five billion, two hundred twenty-four million, four hundred one thousand, five hundred twenty-three".