155252211531 has 16 divisors (see below), whose sum is σ = 207219968256. Its totient is φ = 103393024416.

The previous prime is 155252211463. The next prime is 155252211539. The reversal of 155252211531 is 135112252551.

It is not a de Polignac number, because 155252211531 - 2¹⁹ = 155251687243 is a prime.

It is a super-3 number, since 3×155252211531³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 155252211492 and 155252211501.

It is not an unprimeable number, because it can be changed into a prime (155252211539) 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, 15377121 + ... + 15387213.

It is an arithmetic number, because the mean of its divisors is an integer number (12951248016).

Almost surely, 2^155252211531 is an apocalyptic number.

155252211531 is a deficient number, since it is larger than the sum of its proper divisors (51967756725).

155252211531 is a wasteful number, since it uses less digits than its factorization.

155252211531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14962.

The product of its digits is 15000, while the sum is 33.

The spelling of 155252211531 in words is "one hundred fifty-five billion, two hundred fifty-two million, two hundred eleven thousand, five hundred thirty-one".