2290781215251 has 20 divisors (see below), whose sum is σ = 3422332782000. Its totient is φ = 1527052885776.

The previous prime is 2290781215181. The next prime is 2290781215253. The reversal of 2290781215251 is 1525121870922.

It is a happy number.

2290781215251 is a `hidden beast` number, since 2 + 29 + 0 + 7 + 81 + 21 + 525 + 1 = 666.

It is not a de Polignac number, because 2290781215251 - 2⁷ = 2290781215123 is a prime.

It is a super-2 number, since 2×2290781215251² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2290781215197 and 2290781215206.

It is not an unprimeable number, because it can be changed into a prime (2290781215253) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 317196 + ... + 2163833.

It is an arithmetic number, because the mean of its divisors is an integer number (171116639100).

Almost surely, 2^{2290781215251} is an apocalyptic number.

2290781215251 is a deficient number, since it is larger than the sum of its proper divisors (1131551566749).

2290781215251 is a wasteful number, since it uses less digits than its factorization.

2290781215251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492440 (or 2492431 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 2290781215251 in words is "two trillion, two hundred ninety billion, seven hundred eighty-one million, two hundred fifteen thousand, two hundred fifty-one".