72514157 has 2 divisors, whose sum is σ = 72514158. Its totient is φ = 72514156.

The previous prime is 72514121. The next prime is 72514187. The reversal of 72514157 is 75141527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39175081 + 33339076 = 6259^2 + 5774^2 .

It is an emirp because it is prime and its reverse (75141527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72514157 - 2¹⁸ = 72252013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72514187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36257078 + 36257079.

It is an arithmetic number, because the mean of its divisors is an integer number (36257079).

Almost surely, 2^72514157 is an apocalyptic number.

It is an amenable number.

72514157 is a deficient number, since it is larger than the sum of its proper divisors (1).

72514157 is an equidigital number, since it uses as much as digits as its factorization.

72514157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9800, while the sum is 32.

The square root of 72514157 is about 8515.5244700488. The cubic root of 72514157 is about 417.0046849284.

The spelling of 72514157 in words is "seventy-two million, five hundred fourteen thousand, one hundred fifty-seven".