7272021132 has 24 divisors (see below), whose sum is σ = 18853388400. Its totient is φ = 2424007008.

The previous prime is 7272021101. The next prime is 7272021157. The reversal of 7272021132 is 2311202727.

It is a super-2 number, since 2×7272021132² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 7272021096 and 7272021105.

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, 33666657 + ... + 33666872.

It is an arithmetic number, because the mean of its divisors is an integer number (785557850).

Almost surely, 2^7272021132 is an apocalyptic number.

It is an amenable number.

7272021132 is an abundant number, since it is smaller than the sum of its proper divisors (11581367268).

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

7272021132 is a wasteful number, since it uses less digits than its factorization.

7272021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67333542 (or 67333534 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 7272021132 is about 85276.1463247490. The cubic root of 7272021132 is about 1937.3959048452.

Adding to 7272021132 its reverse (2311202727), we get a palindrome (9583223859).

The spelling of 7272021132 in words is "seven billion, two hundred seventy-two million, twenty-one thousand, one hundred thirty-two".