2501216387 has 2 divisors, whose sum is σ = 2501216388. Its totient is φ = 2501216386.

The previous prime is 2501216309. The next prime is 2501216401. The reversal of 2501216387 is 7836121052.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2501216387 - 2¹⁰ = 2501215363 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (2501216287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250608193 + 1250608194.

It is an arithmetic number, because the mean of its divisors is an integer number (1250608194).

Almost surely, 2^2501216387 is an apocalyptic number.

2501216387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501216387 is an equidigital number, since it uses as much as digits as its factorization.

2501216387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2501216387 is about 50012.1623907625. The cubic root of 2501216387 is about 1357.4288914272.

The spelling of 2501216387 in words is "two billion, five hundred one million, two hundred sixteen thousand, three hundred eighty-seven".