215454155 has 16 divisors (see below), whose sum is σ = 295809024. Its totient is φ = 147575520.

The previous prime is 215454131. The next prime is 215454181. The reversal of 215454155 is 551454512.

It is a de Polignac number, because none of the positive numbers 2^k-215454155 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34310 + ... + 40100.

It is an arithmetic number, because the mean of its divisors is an integer number (18488064).

Almost surely, 2^215454155 is an apocalyptic number.

215454155 is a deficient number, since it is larger than the sum of its proper divisors (80354869).

215454155 is a wasteful number, since it uses less digits than its factorization.

215454155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6866.

The product of its digits is 20000, while the sum is 32.

The square root of 215454155 is about 14678.3566859509. The cubic root of 215454155 is about 599.4941616287.

It can be divided in two parts, 215 and 454155, that multiplied together give a triangular number (97643325 = T₁₃₉₇₄).

The spelling of 215454155 in words is "two hundred fifteen million, four hundred fifty-four thousand, one hundred fifty-five".