2511220997 has 4 divisors (see below), whose sum is σ = 2511348000. Its totient is φ = 2511093996.

The previous prime is 2511220991. The next prime is 2511221003. The reversal of 2511220997 is 7990221152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2511220991) and next prime (2511221003).

It is a cyclic number.

It is not a de Polignac number, because 2511220997 - 2⁴ = 2511220981 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 2511220997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2511220991) 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, 26753 + ... + 75750.

It is an arithmetic number, because the mean of its divisors is an integer number (627837000).

Almost surely, 2^2511220997 is an apocalyptic number.

It is an amenable number.

2511220997 is a deficient number, since it is larger than the sum of its proper divisors (127003).

2511220997 is a wasteful number, since it uses less digits than its factorization.

2511220997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127002.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 2511220997 is about 50112.0843410050. The cubic root of 2511220997 is about 1359.2363426509.

The spelling of 2511220997 in words is "two billion, five hundred eleven million, two hundred twenty thousand, nine hundred ninety-seven".