155134520231501 has 4 divisors (see below), whose sum is σ = 155275937297532. Its totient is φ = 154993103165472.

The previous prime is 155134520231443. The next prime is 155134520231507. The reversal of 155134520231501 is 105132025431551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58734228958276 + 96400291273225 = 7663826^2 + 9818365^2 .

It is a cyclic number.

It is not a de Polignac number, because 155134520231501 - 2¹⁴ = 155134520215117 is a prime.

It is a super-3 number, since 3×155134520231501³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155134520231507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70708531370 + ... + 70708533563.

It is an arithmetic number, because the mean of its divisors is an integer number (38818984324383).

Almost surely, 2^{155134520231501} is an apocalyptic number.

It is an amenable number.

155134520231501 is a deficient number, since it is larger than the sum of its proper divisors (141417066031).

155134520231501 is a wasteful number, since it uses less digits than its factorization.

155134520231501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141417066030.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 155134520231501 in words is "one hundred fifty-five trillion, one hundred thirty-four billion, five hundred twenty million, two hundred thirty-one thousand, five hundred one".