53431020 has 72 divisors (see below), whose sum is σ = 163734480. Its totient is φ = 14102400.

The previous prime is 53431009. The next prime is 53431031. The reversal of 53431020 is 2013435.

It is an interprime number because it is at equal distance from previous prime (53431009) and next prime (53431031).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 53430984 and 53431002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16711 + ... + 19649.

It is an arithmetic number, because the mean of its divisors is an integer number (2274090).

Almost surely, 2^53431020 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 53431020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81867240).

53431020 is an abundant number, since it is smaller than the sum of its proper divisors (110303460).

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

53431020 is a wasteful number, since it uses less digits than its factorization.

53431020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055 (or 3050 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 53431020 is about 7309.6525225212. The cubic root of 53431020 is about 376.6440880645.

Adding to 53431020 its reverse (2013435), we get a palindrome (55444455).

The spelling of 53431020 in words is "fifty-three million, four hundred thirty-one thousand, twenty".