72201051 has 20 divisors (see below), whose sum is σ = 116154192. Its totient is φ = 44430768.

The previous prime is 72201049. The next prime is 72201053. The reversal of 72201051 is 15010227.

It is an interprime number because it is at equal distance from previous prime (72201049) and next prime (72201053).

It is not a de Polignac number, because 72201051 - 2¹ = 72201049 is a prime.

It is a super-3 number, since 3×72201051³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72201053) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33231 + ... + 35336.

Almost surely, 2^72201051 is an apocalyptic number.

72201051 is a deficient number, since it is larger than the sum of its proper divisors (43953141).

72201051 is a wasteful number, since it uses less digits than its factorization.

72201051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68592 (or 68583 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 72201051 is about 8497.1201592069. The cubic root of 72201051 is about 416.4036296804.

Adding to 72201051 its reverse (15010227), we get a palindrome (87211278).

The spelling of 72201051 in words is "seventy-two million, two hundred one thousand, fifty-one".