531380155 has 8 divisors (see below), whose sum is σ = 665380512. Its totient is φ = 406621248.

The previous prime is 531380141. The next prime is 531380183. The reversal of 531380155 is 551083135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 531380155 - 2¹³ = 531371963 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2310234 + ... + 2310463.

It is an arithmetic number, because the mean of its divisors is an integer number (83172564).

Almost surely, 2^531380155 is an apocalyptic number.

531380155 is a deficient number, since it is larger than the sum of its proper divisors (134000357).

531380155 is a wasteful number, since it uses less digits than its factorization.

531380155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620725.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 531380155 is about 23051.6844286920. The cubic root of 531380155 is about 809.9690863577.

The spelling of 531380155 in words is "five hundred thirty-one million, three hundred eighty thousand, one hundred fifty-five".