155276001 has 16 divisors (see below), whose sum is σ = 232953600. Its totient is φ = 102205584.

The previous prime is 155275987. The next prime is 155276021. The reversal of 155276001 is 100672551.

155276001 is a `hidden beast` number, since 1 + 5 + 52 + 7 + 600 + 1 = 666.

It is not a de Polignac number, because 155276001 - 2¹¹ = 155273953 is a prime.

It is a super-2 number, since 2×155276001² = 48221272973104002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (155276021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34266 + ... + 38531.

It is an arithmetic number, because the mean of its divisors is an integer number (14559600).

Almost surely, 2^155276001 is an apocalyptic number.

It is an amenable number.

155276001 is a deficient number, since it is larger than the sum of its proper divisors (77677599).

155276001 is an equidigital number, since it uses as much as digits as its factorization.

155276001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72885 (or 72879 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 155276001 is about 12460.9791348834. The cubic root of 155276001 is about 537.4871831088.

It can be divided in two parts, 15527 and 6001, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 155276001 in words is "one hundred fifty-five million, two hundred seventy-six thousand, one".