316525412654021 has 4 divisors (see below), whose sum is σ = 316525914423852. Its totient is φ = 316524910884192.

The previous prime is 316525412653987. The next prime is 316525412654023. The reversal of 316525412654021 is 120456214525613.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 221095666149796 + 95429746504225 = 14869286^2 + 9768815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-316525412654021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316525412654023) 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, 249937496 + ... + 251200721.

It is an arithmetic number, because the mean of its divisors is an integer number (79131478605963).

Almost surely, 2^{316525412654021} is an apocalyptic number.

It is an amenable number.

316525412654021 is a deficient number, since it is larger than the sum of its proper divisors (501769831).

316525412654021 is an equidigital number, since it uses as much as digits as its factorization.

316525412654021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501769830.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 316525412654021 in words is "three hundred sixteen trillion, five hundred twenty-five billion, four hundred twelve million, six hundred fifty-four thousand, twenty-one".