53151616 has 64 divisors (see below), whose sum is σ = 122179680. Its totient is φ = 22560768.

The previous prime is 53151613. The next prime is 53151617. The reversal of 53151616 is 61615135.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×53151616² = 5650188566822912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53151613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122536 + ... + 122968.

Almost surely, 2^53151616 is an apocalyptic number.

53151616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53151616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61089840).

53151616 is an abundant number, since it is smaller than the sum of its proper divisors (69028064).

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

53151616 is a wasteful number, since it uses less digits than its factorization.

53151616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 579 counting only the distinct ones).

The product of its digits is 2700, while the sum is 28.

The square root of 53151616 is about 7290.5154824608. The cubic root of 53151616 is about 375.9864187036.

The spelling of 53151616 in words is "fifty-three million, one hundred fifty-one thousand, six hundred sixteen".