71220552 has 128 divisors (see below), whose sum is σ = 201398400. Its totient is φ = 20846592.

The previous prime is 71220551. The next prime is 71220553. The reversal of 71220552 is 25502217.

It is an interprime number because it is at equal distance from previous prime (71220551) and next prime (71220553).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (71220551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 975588 + ... + 975660.

It is an arithmetic number, because the mean of its divisors is an integer number (1573425).

Almost surely, 2^71220552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71220552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100699200).

71220552 is an abundant number, since it is smaller than the sum of its proper divisors (130177848).

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

71220552 is a wasteful number, since it uses less digits than its factorization.

71220552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 71220552 is about 8439.2269788174. The cubic root of 71220552 is about 414.5100949512.

Adding to 71220552 its reverse (25502217), we get a palindrome (96722769).

The spelling of 71220552 in words is "seventy-one million, two hundred twenty thousand, five hundred fifty-two".