2163215401 has 2 divisors, whose sum is σ = 2163215402. Its totient is φ = 2163215400.

The previous prime is 2163215393. The next prime is 2163215413. The reversal of 2163215401 is 1045123612.

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., 2123827225 + 39388176 = 46085^2 + 6276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163215401 - 2³ = 2163215393 is a prime.

It is a super-2 number, since 2×2163215401² = 9359001742247181602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2163213401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081607700 + 1081607701.

It is an arithmetic number, because the mean of its divisors is an integer number (1081607701).

Almost surely, 2^2163215401 is an apocalyptic number.

It is an amenable number.

2163215401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163215401 is an equidigital number, since it uses as much as digits as its factorization.

2163215401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2163215401 is about 46510.3794974842. The cubic root of 2163215401 is about 1293.3019192884.

The spelling of 2163215401 in words is "two billion, one hundred sixty-three million, two hundred fifteen thousand, four hundred one".