2215155551 has 8 divisors (see below), whose sum is σ = 2541019680. Its totient is φ = 1891644768.

The previous prime is 2215155529. The next prime is 2215155563. The reversal of 2215155551 is 1555515122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2215155551 - 2¹⁰ = 2215154527 is a prime.

It is a super-2 number, since 2×2215155551² = 9813828230252227202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215155751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586316 + ... + 590081.

It is an arithmetic number, because the mean of its divisors is an integer number (317627460).

Almost surely, 2^2215155551 is an apocalyptic number.

2215155551 is a deficient number, since it is larger than the sum of its proper divisors (325864129).

2215155551 is a wasteful number, since it uses less digits than its factorization.

2215155551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176673.

The product of its digits is 12500, while the sum is 32.

The square root of 2215155551 is about 47065.4390290795. The cubic root of 2215155551 is about 1303.5711574185.

The spelling of 2215155551 in words is "two billion, two hundred fifteen million, one hundred fifty-five thousand, five hundred fifty-one".