2215140551 has 4 divisors (see below), whose sum is σ = 2385535992. Its totient is φ = 2044745112.

The previous prime is 2215140547. The next prime is 2215140559. The reversal of 2215140551 is 1550415122.

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 2215140551 - 2² = 2215140547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2215140551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215140559) 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, 85197701 + ... + 85197726.

It is an arithmetic number, because the mean of its divisors is an integer number (596383998).

Almost surely, 2^2215140551 is an apocalyptic number.

2215140551 is a deficient number, since it is larger than the sum of its proper divisors (170395441).

2215140551 is a wasteful number, since it uses less digits than its factorization.

2215140551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170395440.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 2215140551 is about 47065.2796762114. The cubic root of 2215140551 is about 1303.5682150199.

Adding to 2215140551 its reverse (1550415122), we get a palindrome (3765555673).

The spelling of 2215140551 in words is "two billion, two hundred fifteen million, one hundred forty thousand, five hundred fifty-one".