5215204978 has 4 divisors (see below), whose sum is σ = 7822807470. Its totient is φ = 2607602488.

The previous prime is 5215204963. The next prime is 5215204979. The reversal of 5215204978 is 8794025125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5144762529 + 70442449 = 71727^2 + 8393^2 .

It is not an unprimeable number, because it can be changed into a prime (5215204979) 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 as a sum of consecutive naturals, namely, 1303801243 + ... + 1303801246.

Almost surely, 2^5215204978 is an apocalyptic number.

5215204978 is a deficient number, since it is larger than the sum of its proper divisors (2607602492).

5215204978 is a wasteful number, since it uses less digits than its factorization.

5215204978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607602491.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 5215204978 is about 72216.3761068084. The cubic root of 5215204978 is about 1734.1651760312.

The spelling of 5215204978 in words is "five billion, two hundred fifteen million, two hundred four thousand, nine hundred seventy-eight".