53521450 has 12 divisors (see below), whose sum is σ = 99549990. Its totient is φ = 21408560.

The previous prime is 53521439. The next prime is 53521451. The reversal of 53521450 is 5412535.

It can be written as a sum of positive squares in 3 ways, for example, as 39526369 + 13995081 = 6287^2 + 3741^2 .

It is a super-2 number, since 2×53521450² = 5729091220205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (53521451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 535165 + ... + 535264.

Almost surely, 2^53521450 is an apocalyptic number.

53521450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

53521450 is a deficient number, since it is larger than the sum of its proper divisors (46028540).

53521450 is a wasteful number, since it uses less digits than its factorization.

53521450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070441 (or 1070436 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 53521450 is about 7315.8355640350. The cubic root of 53521450 is about 376.8564536397.

Adding to 53521450 its reverse (5412535), we get a palindrome (58933985).

The spelling of 53521450 in words is "fifty-three million, five hundred twenty-one thousand, four hundred fifty".