1415221091 has 2 divisors, whose sum is σ = 1415221092. Its totient is φ = 1415221090.

The previous prime is 1415221069. The next prime is 1415221111. The reversal of 1415221091 is 1901225141.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1415221091 - 2²² = 1411026787 is a prime.

It is a super-2 number, since 2×1415221091² = 4005701472822460562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1415221091.

It is not a weakly prime, because it can be changed into another prime (1465221091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 707610545 + 707610546.

It is an arithmetic number, because the mean of its divisors is an integer number (707610546).

Almost surely, 2^1415221091 is an apocalyptic number.

1415221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1415221091 is an equidigital number, since it uses as much as digits as its factorization.

1415221091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1415221091 is about 37619.4243842194. The cubic root of 1415221091 is about 1122.7285437000.

The spelling of 1415221091 in words is "one billion, four hundred fifteen million, two hundred twenty-one thousand, ninety-one".