53213706 has 192 divisors, whose sum is σ = 158112000. Its totient is φ = 13208832.

The previous prime is 53213687. The next prime is 53213717. The reversal of 53213706 is 60731235.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 53213706.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3130210 + ... + 3130226.

It is an arithmetic number, because the mean of its divisors is an integer number (823500).

Almost surely, 2^53213706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53213706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79056000).

53213706 is an abundant number, since it is smaller than the sum of its proper divisors (104898294).

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

53213706 is a wasteful number, since it uses less digits than its factorization.

53213706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 53213706 is about 7294.7725118745. The cubic root of 53213706 is about 376.1327667930.

The spelling of 53213706 in words is "fifty-three million, two hundred thirteen thousand, seven hundred six".