155420225253 has 10 divisors (see below), whose sum is σ = 232170953894. Its totient is φ = 103613483448.

The previous prime is 155420225239. The next prime is 155420225269. The reversal of 155420225253 is 352522024551.

155420225253 is a `hidden beast` number, since 1 + 5 + 5 + 420 + 225 + 2 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 145117569249 + 10302656004 = 380943^2 + 101502^2 .

It is not a de Polignac number, because 155420225253 - 2⁴ = 155420225237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155420225203) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 959384026 + ... + 959384187.

Almost surely, 2^155420225253 is an apocalyptic number.

It is an amenable number.

155420225253 is a deficient number, since it is larger than the sum of its proper divisors (76750728641).

155420225253 is an equidigital number, since it uses as much as digits as its factorization.

155420225253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918768225 (or 1918768216 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 155420225253 in words is "one hundred fifty-five billion, four hundred twenty million, two hundred twenty-five thousand, two hundred fifty-three".