5215401640 has 64 divisors (see below), whose sum is σ = 11912812560. Its totient is φ = 2054707200.

The previous prime is 5215401629. The next prime is 5215401647. The reversal of 5215401640 is 461045125.

It can be written as a sum of positive squares in 8 ways, for example, as 4687045444 + 528356196 = 68462^2 + 22986^2 .

It is a junction number, because it is equal to n+sod(n) for n = 5215401599 and 5215401608.

It is not an unprimeable number, because it can be changed into a prime (5215401647) 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, 792604 + ... + 799156.

Almost surely, 2^5215401640 is an apocalyptic number.

It is an amenable number.

5215401640 is an abundant number, since it is smaller than the sum of its proper divisors (6697410920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5215401640 is a wasteful number, since it uses less digits than its factorization.

5215401640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862 (or 6858 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 5215401640 is about 72217.7377103437. The cubic root of 5215401640 is about 1734.1869738389.

Adding to 5215401640 its reverse (461045125), we get a palindrome (5676446765).

The spelling of 5215401640 in words is "five billion, two hundred fifteen million, four hundred one thousand, six hundred forty".