1000561515 has 8 divisors (see below), whose sum is σ = 1600898448. Its totient is φ = 533632800.

The previous prime is 1000561501. The next prime is 1000561517. The reversal of 1000561515 is 5151650001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1000561515 - 2⁵ = 1000561483 is a prime.

It is a super-2 number, since 2×1000561515² = 2002246690598190450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1000561517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33352036 + ... + 33352065.

It is an arithmetic number, because the mean of its divisors is an integer number (200112306).

Almost surely, 2^1000561515 is an apocalyptic number.

1000561515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1000561515 is a deficient number, since it is larger than the sum of its proper divisors (600336933).

1000561515 is an equidigital number, since it uses as much as digits as its factorization.

1000561515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66704109.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1000561515 is about 31631.6536874062. The cubic root of 1000561515 is about 1000.1871366444.

The spelling of 1000561515 in words is "one billion, five hundred sixty-one thousand, five hundred fifteen".