72151501 has 2 divisors, whose sum is σ = 72151502. Its totient is φ = 72151500.

The previous prime is 72151489. The next prime is 72151523. The reversal of 72151501 is 10515127.

It is an a-pointer prime, because the next prime (72151523) can be obtained adding 72151501 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41293476 + 30858025 = 6426^2 + 5555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72151501 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72151561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36075750 + 36075751.

It is an arithmetic number, because the mean of its divisors is an integer number (36075751).

Almost surely, 2^72151501 is an apocalyptic number.

It is an amenable number.

72151501 is a deficient number, since it is larger than the sum of its proper divisors (1).

72151501 is an equidigital number, since it uses as much as digits as its factorization.

72151501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 72151501 is about 8494.2039650576. The cubic root of 72151501 is about 416.3083516509.

Adding to 72151501 its reverse (10515127), we get a palindrome (82666628).

The spelling of 72151501 in words is "seventy-two million, one hundred fifty-one thousand, five hundred one".