71625553 has 4 divisors (see below), whose sum is σ = 71705088. Its totient is φ = 71546020.

The previous prime is 71625551. The next prime is 71625577. The reversal of 71625553 is 35552617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71625553 - 2¹ = 71625551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71625551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38401 + ... + 40222.

It is an arithmetic number, because the mean of its divisors is an integer number (17926272).

Almost surely, 2^71625553 is an apocalyptic number.

It is an amenable number.

71625553 is a deficient number, since it is larger than the sum of its proper divisors (79535).

71625553 is an equidigital number, since it uses as much as digits as its factorization.

71625553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79534.

The product of its digits is 31500, while the sum is 34.

The square root of 71625553 is about 8463.1881108717. The cubic root of 71625553 is about 415.2943245251.

The spelling of 71625553 in words is "seventy-one million, six hundred twenty-five thousand, five hundred fifty-three".