72230401 has 4 divisors (see below), whose sum is σ = 74182612. Its totient is φ = 70278192.

The previous prime is 72230393. The next prime is 72230413. The reversal of 72230401 is 10403227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26532801 + 45697600 = 5151^2 + 6760^2 .

It is a cyclic number.

It is not a de Polignac number, because 72230401 - 2³ = 72230393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72230201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976050 + ... + 976123.

It is an arithmetic number, because the mean of its divisors is an integer number (18545653).

Almost surely, 2^72230401 is an apocalyptic number.

It is an amenable number.

72230401 is a deficient number, since it is larger than the sum of its proper divisors (1952211).

72230401 is a wasteful number, since it uses less digits than its factorization.

72230401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952210.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 72230401 is about 8498.8470394519. The cubic root of 72230401 is about 416.4600452529.

Adding to 72230401 its reverse (10403227), we get a palindrome (82633628).

The spelling of 72230401 in words is "seventy-two million, two hundred thirty thousand, four hundred one".