2501816 has 8 divisors (see below), whose sum is σ = 4690920. Its totient is φ = 1250904.

The previous prime is 2501813. The next prime is 2501819. The reversal of 2501816 is 6181052.

It is an interprime number because it is at equal distance from previous prime (2501813) and next prime (2501819).

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2501791 and 2501800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156356 + ... + 156371.

It is an arithmetic number, because the mean of its divisors is an integer number (586365).

2^2501816 is an apocalyptic number.

It is an amenable number.

2501816 is a deficient number, since it is larger than the sum of its proper divisors (2189104).

2501816 is a wasteful number, since it uses less digits than its factorization.

2501816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312733 (or 312729 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2501816 is about 1581.7129954578. The cubic root of 2501816 is about 135.7537354251.

Adding to 2501816 its reverse (6181052), we get a palindrome (8682868).

The spelling of 2501816 in words is "two million, five hundred one thousand, eight hundred sixteen".