72424051 has 4 divisors (see below), whose sum is σ = 82770352. Its totient is φ = 62077752.

The previous prime is 72424043. The next prime is 72424061. The reversal of 72424051 is 15042427.

72424051 is nontrivially palindromic in base 3.

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

It is a cyclic number.

It is not a de Polignac number, because 72424051 - 2³ = 72424043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72424021) 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, 5173140 + ... + 5173153.

It is an arithmetic number, because the mean of its divisors is an integer number (20692588).

Almost surely, 2^72424051 is an apocalyptic number.

72424051 is a deficient number, since it is larger than the sum of its proper divisors (10346301).

72424051 is a wasteful number, since it uses less digits than its factorization.

72424051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346300.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 72424051 is about 8510.2321354943. The cubic root of 72424051 is about 416.8318901720.

Adding to 72424051 its reverse (15042427), we get a palindrome (87466478).

The spelling of 72424051 in words is "seventy-two million, four hundred twenty-four thousand, fifty-one".