71425550 has 96 divisors (see below), whose sum is σ = 162846720. Its totient is φ = 22780800.

The previous prime is 71425547. The next prime is 71425561. The reversal of 71425550 is 5552417.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 314537 + ... + 314763.

It is an arithmetic number, because the mean of its divisors is an integer number (1696320).

Almost surely, 2^71425550 is an apocalyptic number.

71425550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71425550 is an abundant number, since it is smaller than the sum of its proper divisors (91421170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71425550 is a wasteful number, since it uses less digits than its factorization.

71425550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 71425550 is about 8451.3637952700. The cubic root of 71425550 is about 414.9074163236.

Adding to 71425550 its reverse (5552417), we get a palindrome (76977967).

The spelling of 71425550 in words is "seventy-one million, four hundred twenty-five thousand, five hundred fifty".