2215915501 has 2 divisors, whose sum is σ = 2215915502. Its totient is φ = 2215915500.

The previous prime is 2215915483. The next prime is 2215915553. The reversal of 2215915501 is 1055195122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1705607401 + 510308100 = 41299^2 + 22590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215915501 - 2⁹ = 2215914989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2215915571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107957750 + 1107957751.

It is an arithmetic number, because the mean of its divisors is an integer number (1107957751).

Almost surely, 2^2215915501 is an apocalyptic number.

It is an amenable number.

2215915501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215915501 is an equidigital number, since it uses as much as digits as its factorization.

2215915501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 2215915501 is about 47073.5116705775. The cubic root of 2215915501 is about 1303.7202117570.

The spelling of 2215915501 in words is "two billion, two hundred fifteen million, nine hundred fifteen thousand, five hundred one".