1255515015 has 16 divisors (see below), whose sum is σ = 2024644608. Its totient is φ = 664334496.

The previous prime is 1255515013. The next prime is 1255515017. The reversal of 1255515015 is 5105155521.

It is an interprime number because it is at equal distance from previous prime (1255515013) and next prime (1255515017).

It is not a de Polignac number, because 1255515015 - 2¹ = 1255515013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255515011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327627 + ... + 331436.

It is an arithmetic number, because the mean of its divisors is an integer number (126540288).

Almost surely, 2^1255515015 is an apocalyptic number.

1255515015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1255515015 is a deficient number, since it is larger than the sum of its proper divisors (769129593).

1255515015 is a wasteful number, since it uses less digits than its factorization.

1255515015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659198.

The product of its (nonzero) digits is 6250, while the sum is 30.

The square root of 1255515015 is about 35433.2473109649. The cubic root of 1255515015 is about 1078.7992527775.

The spelling of 1255515015 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand, fifteen".