155345531 has 8 divisors (see below), whose sum is σ = 169646400. Its totient is φ = 141074440.

The previous prime is 155345503. The next prime is 155345537. The reversal of 155345531 is 135543551.

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 155345531 - 2¹⁴ = 155329147 is a prime.

It is a super-2 number, since 2×155345531² = 48264468003343922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155345537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4280 + ... + 18138.

It is an arithmetic number, because the mean of its divisors is an integer number (21205800).

Almost surely, 2^155345531 is an apocalyptic number.

155345531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155345531 is a deficient number, since it is larger than the sum of its proper divisors (14300869).

155345531 is a wasteful number, since it uses less digits than its factorization.

155345531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14889.

The product of its digits is 22500, while the sum is 32.

The square root of 155345531 is about 12463.7687318082. The cubic root of 155345531 is about 537.5673970652.

The spelling of 155345531 in words is "one hundred fifty-five million, three hundred forty-five thousand, five hundred thirty-one".