2215533451 has 4 divisors (see below), whose sum is σ = 2287002304. Its totient is φ = 2144064600.

The previous prime is 2215533431. The next prime is 2215533473. The reversal of 2215533451 is 1543355122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2215533451 - 2¹¹ = 2215531403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 71468821 = 2215533451 / (2 + 2 + 1 + 5 + 5 + 3 + 3 + 4 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215533431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35734380 + ... + 35734441.

It is an arithmetic number, because the mean of its divisors is an integer number (571750576).

Almost surely, 2^2215533451 is an apocalyptic number.

2215533451 is a deficient number, since it is larger than the sum of its proper divisors (71468853).

2215533451 is an equidigital number, since it uses as much as digits as its factorization.

2215533451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71468852.

The product of its digits is 18000, while the sum is 31.

The square root of 2215533451 is about 47069.4534809998. The cubic root of 2215533451 is about 1303.6452818639.

Adding to 2215533451 its reverse (1543355122), we get a palindrome (3758888573).

The spelling of 2215533451 in words is "two billion, two hundred fifteen million, five hundred thirty-three thousand, four hundred fifty-one".