2490311621 has 4 divisors (see below), whose sum is σ = 2846070432. Its totient is φ = 2134552812.

The previous prime is 2490311611. The next prime is 2490311633. The reversal of 2490311621 is 1261130942.

2490311621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1261130942 = 2 ⋅630565471.

It is not a de Polignac number, because 2490311621 - 2¹⁴ = 2490295237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2490311611) 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, 177879395 + ... + 177879408.

It is an arithmetic number, because the mean of its divisors is an integer number (711517608).

Almost surely, 2^2490311621 is an apocalyptic number.

It is an amenable number.

2490311621 is a deficient number, since it is larger than the sum of its proper divisors (355758811).

2490311621 is an equidigital number, since it uses as much as digits as its factorization.

2490311621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355758810.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2490311621 is about 49903.0221629913. The cubic root of 2490311621 is about 1355.4533181847.

The spelling of 2490311621 in words is "two billion, four hundred ninety million, three hundred eleven thousand, six hundred twenty-one".