155420245203 has 16 divisors (see below), whose sum is σ = 208221167616. Its totient is φ = 103116965760.

The previous prime is 155420245177. The next prime is 155420245219. The reversal of 155420245203 is 302542024551.

It is a happy number.

It is not a de Polignac number, because 155420245203 - 2⁶ = 155420245139 is a prime.

It is a super-2 number, since 2×155420245203² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155420245223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1064350 + ... + 1201532.

It is an arithmetic number, because the mean of its divisors is an integer number (13013822976).

Almost surely, 2^155420245203 is an apocalyptic number.

155420245203 is a deficient number, since it is larger than the sum of its proper divisors (52800922413).

155420245203 is a wasteful number, since it uses less digits than its factorization.

155420245203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138994.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 155420245203 its reverse (302542024551), we get a palindrome (457962269754).

The spelling of 155420245203 in words is "one hundred fifty-five billion, four hundred twenty million, two hundred forty-five thousand, two hundred three".