1015523213 has 2 divisors, whose sum is σ = 1015523214. Its totient is φ = 1015523212.

The previous prime is 1015523183. The next prime is 1015523227. The reversal of 1015523213 is 3123255101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988347844 + 27175369 = 31438^2 + 5213^2 .

It is an emirp because it is prime and its reverse (3123255101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1015523213 - 2¹² = 1015519117 is a prime.

It is a super-2 number, since 2×1015523213² = 2062574792283686738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015523233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507761606 + 507761607.

It is an arithmetic number, because the mean of its divisors is an integer number (507761607).

Almost surely, 2^1015523213 is an apocalyptic number.

It is an amenable number.

1015523213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015523213 is an equidigital number, since it uses as much as digits as its factorization.

1015523213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1015523213 is about 31867.2749540967. The cubic root of 1015523213 is about 1005.1478584136.

Adding to 1015523213 its reverse (3123255101), we get a palindrome (4138778314).

The spelling of 1015523213 in words is "one billion, fifteen million, five hundred twenty-three thousand, two hundred thirteen".