72465551 has 2 divisors, whose sum is σ = 72465552. Its totient is φ = 72465550.

The previous prime is 72465541. The next prime is 72465593. The reversal of 72465551 is 15556427.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72465551 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 (72465541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36232775 + 36232776.

It is an arithmetic number, because the mean of its divisors is an integer number (36232776).

Almost surely, 2^72465551 is an apocalyptic number.

72465551 is a deficient number, since it is larger than the sum of its proper divisors (1).

72465551 is an equidigital number, since it uses as much as digits as its factorization.

72465551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 35.

The square root of 72465551 is about 8512.6700276705. The cubic root of 72465551 is about 416.9114918152.

The spelling of 72465551 in words is "seventy-two million, four hundred sixty-five thousand, five hundred fifty-one".