52197816 has 64 divisors (see below), whose sum is σ = 143349120. Its totient is φ = 15707520.

The previous prime is 52197809. The next prime is 52197823. The reversal of 52197816 is 61879125.

It is an interprime number because it is at equal distance from previous prime (52197809) and next prime (52197823).

It is a super-2 number, since 2×52197816² = 5449223990339712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42426 + ... + 43638.

It is an arithmetic number, because the mean of its divisors is an integer number (2239830).

Almost surely, 2^52197816 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 52197816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71674560).

52197816 is an abundant number, since it is smaller than the sum of its proper divisors (91151304).

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

52197816 is a wasteful number, since it uses less digits than its factorization.

52197816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396 (or 1392 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 52197816 is about 7224.8056029211. The cubic root of 52197816 is about 373.7238183321.

The spelling of 52197816 in words is "fifty-two million, one hundred ninety-seven thousand, eight hundred sixteen".