7153221440 has 56 divisors (see below), whose sum is σ = 17142223272. Its totient is φ = 2843043840.

The previous prime is 7153221391. The next prime is 7153221457. The reversal of 7153221440 is 441223517.

It can be written as a sum of positive squares in 4 ways, for example, as 355548736 + 6797672704 = 18856^2 + 82448^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20951 + ... + 121430.

Almost surely, 2^7153221440 is an apocalyptic number.

It is an amenable number.

7153221440 is an abundant number, since it is smaller than the sum of its proper divisors (9989001832).

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

7153221440 is a wasteful number, since it uses less digits than its factorization.

7153221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142555 (or 142545 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 7153221440 is about 84576.7192553601. The cubic root of 7153221440 is about 1926.7878091528.

Adding to 7153221440 its reverse (441223517), we get a palindrome (7594444957).

The spelling of 7153221440 in words is "seven billion, one hundred fifty-three million, two hundred twenty-one thousand, four hundred forty".