155215071 has 12 divisors (see below), whose sum is σ = 244581480. Its totient is φ = 94069680.

The previous prime is 155215069. The next prime is 155215087. The reversal of 155215071 is 170512551.

155215071 is a `hidden beast` number, since 155 + 2 + 1 + 507 + 1 = 666.

It is not a de Polignac number, because 155215071 - 2¹ = 155215069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155215001) 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 11 ways as a sum of consecutive naturals, for example, 783816 + ... + 784013.

It is an arithmetic number, because the mean of its divisors is an integer number (20381790).

Almost surely, 2^155215071 is an apocalyptic number.

155215071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155215071 is a deficient number, since it is larger than the sum of its proper divisors (89366409).

155215071 is a wasteful number, since it uses less digits than its factorization.

155215071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567846 (or 1567843 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The square root of 155215071 is about 12458.5340630429. The cubic root of 155215071 is about 537.4168709371.

The spelling of 155215071 in words is "one hundred fifty-five million, two hundred fifteen thousand, seventy-one".