72352531 has 8 divisors (see below), whose sum is σ = 74156544. Its totient is φ = 70554120.

The previous prime is 72352529. The next prime is 72352559. The reversal of 72352531 is 13525327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72352531 - 2¹ = 72352529 is a prime.

It is a super-2 number, since 2×72352531² = 10469777484211922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72352531.

It is not an unprimeable number, because it can be changed into a prime (72352571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38250 + ... + 40096.

It is an arithmetic number, because the mean of its divisors is an integer number (9269568).

Almost surely, 2^72352531 is an apocalyptic number.

72352531 is a deficient number, since it is larger than the sum of its proper divisors (1804013).

72352531 is a wasteful number, since it uses less digits than its factorization.

72352531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801.

The product of its digits is 6300, while the sum is 28.

The square root of 72352531 is about 8506.0290970582. The cubic root of 72352531 is about 416.6946354203.

Adding to 72352531 its reverse (13525327), we get a palindrome (85877858).

The spelling of 72352531 in words is "seventy-two million, three hundred fifty-two thousand, five hundred thirty-one".