158021055 has 36 divisors (see below), whose sum is σ = 277423848. Its totient is φ = 83207520.

The previous prime is 158021027. The next prime is 158021107. The reversal of 158021055 is 550120851.

It is not a de Polignac number, because 158021055 - 2⁶ = 158020991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 477240 + ... + 477570.

It is an arithmetic number, because the mean of its divisors is an integer number (7706218).

Almost surely, 2^158021055 is an apocalyptic number.

158021055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

158021055 is a deficient number, since it is larger than the sum of its proper divisors (119402793).

158021055 is a wasteful number, since it uses less digits than its factorization.

158021055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 158021055 is about 12570.6425850073. The cubic root of 158021055 is about 540.6360304030.

The spelling of 158021055 in words is "one hundred fifty-eight million, twenty-one thousand, fifty-five".