2515478061 has 4 divisors (see below), whose sum is σ = 3353970752. Its totient is φ = 1676985372.

The previous prime is 2515478003. The next prime is 2515478071. The reversal of 2515478061 is 1608745152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2515478061 - 2¹⁰ = 2515477037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2515478071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419246341 + ... + 419246346.

It is an arithmetic number, because the mean of its divisors is an integer number (838492688).

Almost surely, 2^2515478061 is an apocalyptic number.

It is an amenable number.

2515478061 is a deficient number, since it is larger than the sum of its proper divisors (838492691).

2515478061 is an equidigital number, since it uses as much as digits as its factorization.

2515478061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838492690.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 2515478061 is about 50154.5417783873. The cubic root of 2515478061 is about 1360.0039758030.

The spelling of 2515478061 in words is "two billion, five hundred fifteen million, four hundred seventy-eight thousand, sixty-one".