1515231983 has 2 divisors, whose sum is σ = 1515231984. Its totient is φ = 1515231982.

The previous prime is 1515231943. The next prime is 1515232021. The reversal of 1515231983 is 3891325151.

It is an a-pointer prime, because the next prime (1515232021) can be obtained adding 1515231983 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1515231983 - 2¹⁸ = 1514969839 is a prime.

It is a super-2 number, since 2×1515231983² = 4591855924612224578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1515231943) 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, 757615991 + 757615992.

It is an arithmetic number, because the mean of its divisors is an integer number (757615992).

Almost surely, 2^1515231983 is an apocalyptic number.

1515231983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1515231983 is an equidigital number, since it uses as much as digits as its factorization.

1515231983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 1515231983 is about 38925.9808225817. The cubic root of 1515231983 is about 1148.5759267400.

The spelling of 1515231983 in words is "one billion, five hundred fifteen million, two hundred thirty-one thousand, nine hundred eighty-three".