71625531 has 8 divisors (see below), whose sum is σ = 98581504. Its totient is φ = 46209960.

The previous prime is 71625503. The next prime is 71625551. The reversal of 71625531 is 13552617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71625531 - 2¹³ = 71617339 is a prime.

It is a super-2 number, since 2×71625531² = 10260433382063922, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 384991 + ... + 385176.

It is an arithmetic number, because the mean of its divisors is an integer number (12322688).

Almost surely, 2^71625531 is an apocalyptic number.

71625531 is a deficient number, since it is larger than the sum of its proper divisors (26955973).

71625531 is a wasteful number, since it uses less digits than its factorization.

71625531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770201.

The product of its digits is 6300, while the sum is 30.

The square root of 71625531 is about 8463.1868111250. The cubic root of 71625531 is about 415.2942820054.

The spelling of 71625531 in words is "seventy-one million, six hundred twenty-five thousand, five hundred thirty-one".