53061690 has 64 divisors (see below), whose sum is σ = 144986112. Its totient is φ = 12302400.

The previous prime is 53061653. The next prime is 53061707. The reversal of 53061690 is 9616035.

It is a happy number.

It is a super-2 number, since 2×53061690² = 5631085891312200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4095 + ... + 11085.

It is an arithmetic number, because the mean of its divisors is an integer number (2265408).

Almost surely, 2^53061690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53061690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72493056).

53061690 is an abundant number, since it is smaller than the sum of its proper divisors (91924422).

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

53061690 is a wasteful number, since it uses less digits than its factorization.

53061690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 53061690 is about 7284.3455436985. The cubic root of 53061690 is about 375.7742580761.

It can be divided in two parts, 5306 and 1690, that added together give a palindrome (6996).

The spelling of 53061690 in words is "fifty-three million, sixty-one thousand, six hundred ninety".