7122315420 has 384 divisors, whose sum is σ = 24876149760. Its totient is φ = 1698278400.

The previous prime is 7122315419. The next prime is 7122315439. The reversal of 7122315420 is 245132217.

7122315420 is a `hidden beast` number, since 7 + 1 + 2 + 231 + 5 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 54368755 + ... + 54368885.

It is an arithmetic number, because the mean of its divisors is an integer number (64781640).

Almost surely, 2^7122315420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7122315420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12438074880).

7122315420 is an abundant number, since it is smaller than the sum of its proper divisors (17753834340).

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

7122315420 is a wasteful number, since it uses less digits than its factorization.

7122315420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 7122315420 is about 84393.8115029769. The cubic root of 7122315420 is about 1924.0088602108.

Adding to 7122315420 its reverse (245132217), we get a palindrome (7367447637).

It can be divided in two parts, 712 and 2315420, that added together give a palindrome (2316132).

The spelling of 7122315420 in words is "seven billion, one hundred twenty-two million, three hundred fifteen thousand, four hundred twenty".