72160552 has 8 divisors (see below), whose sum is σ = 135301050. Its totient is φ = 36080272.

The previous prime is 72160483. The next prime is 72160559. The reversal of 72160552 is 25506127.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 1028196 = 8434^2 + 1014^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 72160552.

It is not an unprimeable number, because it can be changed into a prime (72160559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4510027 + ... + 4510042.

Almost surely, 2^72160552 is an apocalyptic number.

It is an amenable number.

72160552 is a deficient number, since it is larger than the sum of its proper divisors (63140498).

72160552 is a wasteful number, since it uses less digits than its factorization.

72160552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9020075 (or 9020071 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 72160552 is about 8494.7367234070. The cubic root of 72160552 is about 416.3257587702.

Adding to 72160552 its reverse (25506127), we get a palindrome (97666679).

The spelling of 72160552 in words is "seventy-two million, one hundred sixty thousand, five hundred fifty-two".