2490651021 has 8 divisors (see below), whose sum is σ = 3332603680. Its totient is φ = 1654566192.

The previous prime is 2490651013. The next prime is 2490651029. The reversal of 2490651021 is 1201560942.

It is an interprime number because it is at equal distance from previous prime (2490651013) and next prime (2490651029).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2490651021 - 2³ = 2490651013 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 2490651021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2490651029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1465966 + ... + 1467663.

It is an arithmetic number, because the mean of its divisors is an integer number (416575460).

Almost surely, 2^2490651021 is an apocalyptic number.

It is an amenable number.

2490651021 is a deficient number, since it is larger than the sum of its proper divisors (841952659).

2490651021 is a wasteful number, since it uses less digits than its factorization.

2490651021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2933915.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 2490651021 is about 49906.4226427822. The cubic root of 2490651021 is about 1355.5148928024.

The spelling of 2490651021 in words is "two billion, four hundred ninety million, six hundred fifty-one thousand, twenty-one".