52139952 has 180 divisors, whose sum is σ = 165826440. Its totient is φ = 15234048.

The previous prime is 52139947. The next prime is 52139953. The reversal of 52139952 is 25993125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (24300) is a multiple of the sum of its prime divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52139953) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 883699 + ... + 883757.

It is an arithmetic number, because the mean of its divisors is an integer number (921258).

Almost surely, 2^52139952 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 52139952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82913220).

52139952 is an abundant number, since it is smaller than the sum of its proper divisors (113686488).

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

52139952 is a wasteful number, since it uses less digits than its factorization.

52139952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 100 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 52139952 is about 7220.7999556836. The cubic root of 52139952 is about 373.5856698265.

The spelling of 52139952 in words is "fifty-two million, one hundred thirty-nine thousand, nine hundred fifty-two".