2215511451 has 24 divisors (see below), whose sum is σ = 3394282320. Its totient is φ = 1387723776.

The previous prime is 2215511429. The next prime is 2215511453. The reversal of 2215511451 is 1541155122.

It is a happy number.

It is not a de Polignac number, because 2215511451 - 2⁶ = 2215511387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2215511453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78520 + ... + 102938.

It is an arithmetic number, because the mean of its divisors is an integer number (141428430).

Almost surely, 2^2215511451 is an apocalyptic number.

2215511451 is a deficient number, since it is larger than the sum of its proper divisors (1178770869).

2215511451 is a wasteful number, since it uses less digits than its factorization.

2215511451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25035 (or 25032 counting only the distinct ones).

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

The square root of 2215511451 is about 47069.2197832086. The cubic root of 2215511451 is about 1303.6409668322.

Adding to 2215511451 its reverse (1541155122), we get a palindrome (3756666573).

The spelling of 2215511451 in words is "two billion, two hundred fifteen million, five hundred eleven thousand, four hundred fifty-one".