155340531 has 8 divisors (see below), whose sum is σ = 230134160. Its totient is φ = 103560336.

The previous prime is 155340529. The next prime is 155340533. The reversal of 155340531 is 135043551.

155340531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155340529) and next prime (155340533).

It is not a de Polignac number, because 155340531 - 2¹ = 155340529 is a prime.

It is a super-2 number, since 2×155340531² = 48261361142723922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5753353 = 155340531 / (1 + 5 + 5 + 3 + 4 + 0 + 5 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155340495 and 155340504.

It is not an unprimeable number, because it can be changed into a prime (155340533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2876650 + ... + 2876703.

It is an arithmetic number, because the mean of its divisors is an integer number (28766770).

Almost surely, 2^155340531 is an apocalyptic number.

155340531 is a deficient number, since it is larger than the sum of its proper divisors (74793629).

155340531 is an equidigital number, since it uses as much as digits as its factorization.

155340531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5753362 (or 5753356 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 155340531 is about 12463.5681488088. The cubic root of 155340531 is about 537.5616295657.

The spelling of 155340531 in words is "one hundred fifty-five million, three hundred forty thousand, five hundred thirty-one".