72206157 has 16 divisors (see below), whose sum is σ = 102114432. Its totient is φ = 45227520.

The previous prime is 72206119. The next prime is 72206179. The reversal of 72206157 is 75160227.

It is not a de Polignac number, because 72206157 - 2¹¹ = 72204109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72206117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47032 + ... + 48542.

It is an arithmetic number, because the mean of its divisors is an integer number (6382152).

Almost surely, 2^72206157 is an apocalyptic number.

It is an amenable number.

72206157 is a deficient number, since it is larger than the sum of its proper divisors (29908275).

72206157 is a wasteful number, since it uses less digits than its factorization.

72206157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 72206157 is about 8497.4206086318. The cubic root of 72206157 is about 416.4134453585.

The spelling of 72206157 in words is "seventy-two million, two hundred six thousand, one hundred fifty-seven".