315626221061 has 4 divisors (see below), whose sum is σ = 316355150412. Its totient is φ = 314897291712.

The previous prime is 315626221037. The next prime is 315626221063. The reversal of 315626221061 is 160122626513.

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 40519677025 + 275106544036 = 201295^2 + 524506^2 .

It is a cyclic number.

It is not a de Polignac number, because 315626221061 - 2³⁰ = 314552479237 is a prime.

It is a super-2 number, since 2×315626221061² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315626221063) 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, 364464026 + ... + 364464891.

It is an arithmetic number, because the mean of its divisors is an integer number (79088787603).

Almost surely, 2^315626221061 is an apocalyptic number.

It is an amenable number.

315626221061 is a deficient number, since it is larger than the sum of its proper divisors (728929351).

315626221061 is an equidigital number, since it uses as much as digits as its factorization.

315626221061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728929350.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 315626221061 its reverse (160122626513), we get a palindrome (475748847574).

The spelling of 315626221061 in words is "three hundred fifteen billion, six hundred twenty-six million, two hundred twenty-one thousand, sixty-one".