5215722987 has 4 divisors (see below), whose sum is σ = 6954297320. Its totient is φ = 3477148656.

The previous prime is 5215722979. The next prime is 5215722991. The reversal of 5215722987 is 7892275125.

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

It is not a de Polignac number, because 5215722987 - 2³ = 5215722979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5215722917) 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, 869287162 + ... + 869287167.

It is an arithmetic number, because the mean of its divisors is an integer number (1738574330).

Almost surely, 2^5215722987 is an apocalyptic number.

5215722987 is a deficient number, since it is larger than the sum of its proper divisors (1738574333).

5215722987 is a wasteful number, since it uses less digits than its factorization.

5215722987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738574332.

The product of its digits is 705600, while the sum is 48.

The square root of 5215722987 is about 72219.9625242218. The cubic root of 5215722987 is about 1734.2225904206. Note that the first 3 decimals are identical.

The spelling of 5215722987 in words is "five billion, two hundred fifteen million, seven hundred twenty-two thousand, nine hundred eighty-seven".