1015415381 has 2 divisors, whose sum is σ = 1015415382. Its totient is φ = 1015415380.

The previous prime is 1015415353. The next prime is 1015415399. The reversal of 1015415381 is 1835145101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994393156 + 21022225 = 31534^2 + 4585^2 .

It is an emirp because it is prime and its reverse (1835145101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1015415381 - 2¹⁴ = 1015398997 is a prime.

It is a super-2 number, since 2×1015415381² = 2062136791942750322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015415981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507707690 + 507707691.

It is an arithmetic number, because the mean of its divisors is an integer number (507707691).

Almost surely, 2^1015415381 is an apocalyptic number.

It is an amenable number.

1015415381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015415381 is an equidigital number, since it uses as much as digits as its factorization.

1015415381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 1015415381 is about 31865.5830167910. The cubic root of 1015415381 is about 1005.1122803854.

The spelling of 1015415381 in words is "one billion, fifteen million, four hundred fifteen thousand, three hundred eighty-one".