72429551 has 2 divisors, whose sum is σ = 72429552. Its totient is φ = 72429550.

The previous prime is 72429527. The next prime is 72429557. The reversal of 72429551 is 15592427.

It is a strong prime.

It is an emirp because it is prime and its reverse (15592427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72429551 - 2¹⁰ = 72428527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72429557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36214775 + 36214776.

It is an arithmetic number, because the mean of its divisors is an integer number (36214776).

Almost surely, 2^72429551 is an apocalyptic number.

72429551 is a deficient number, since it is larger than the sum of its proper divisors (1).

72429551 is an equidigital number, since it uses as much as digits as its factorization.

72429551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 72429551 is about 8510.5552697812. Note that the first 3 decimals coincide. The cubic root of 72429551 is about 416.8424415350.

The spelling of 72429551 in words is "seventy-two million, four hundred twenty-nine thousand, five hundred fifty-one".