52391207 has 12 divisors (see below), whose sum is σ = 57818904. Its totient is φ = 47080320.

The previous prime is 52391203. The next prime is 52391219. The reversal of 52391207 is 70219325.

It is not a de Polignac number, because 52391207 - 2² = 52391203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52391207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52391203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140273 + ... + 140645.

It is an arithmetic number, because the mean of its divisors is an integer number (4818242).

Almost surely, 2^52391207 is an apocalyptic number.

52391207 is a deficient number, since it is larger than the sum of its proper divisors (5427697).

52391207 is a wasteful number, since it uses less digits than its factorization.

52391207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 52391207 is about 7238.1770495063. The cubic root of 52391207 is about 374.1847938621.

It can be divided in two parts, 5239 and 1207, that added together give a palindrome (6446).

The spelling of 52391207 in words is "fifty-two million, three hundred ninety-one thousand, two hundred seven".