155532071 has 4 divisors (see below), whose sum is σ = 158841312. Its totient is φ = 152222832.

The previous prime is 155532061. The next prime is 155532079. The reversal of 155532071 is 170235551.

It is a happy number.

155532071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 155532071 - 2¹⁸ = 155269927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155532079) 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, 1654550 + ... + 1654643.

It is an arithmetic number, because the mean of its divisors is an integer number (39710328).

Almost surely, 2^155532071 is an apocalyptic number.

155532071 is a deficient number, since it is larger than the sum of its proper divisors (3309241).

155532071 is an equidigital number, since it uses as much as digits as its factorization.

155532071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309240.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 155532071 is about 12471.2497769871. The cubic root of 155532071 is about 537.7824825594.

The spelling of 155532071 in words is "one hundred fifty-five million, five hundred thirty-two thousand, seventy-one".