253421153540 has 48 divisors (see below), whose sum is σ = 542130926400. Its totient is φ = 99481399680.

The previous prime is 253421153473. The next prime is 253421153561. The reversal of 253421153540 is 45351124352.

It is a super-3 number, since 3×253421153540³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253421153540.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306011 + ... + 774909.

It is an arithmetic number, because the mean of its divisors is an integer number (11294394300).

Almost surely, 2^253421153540 is an apocalyptic number.

253421153540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253421153540 is an abundant number, since it is smaller than the sum of its proper divisors (288709772860).

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

253421153540 is a wasteful number, since it uses less digits than its factorization.

253421153540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469412 (or 469410 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 253421153540 its reverse (45351124352), we get a palindrome (298772277892).

The spelling of 253421153540 in words is "two hundred fifty-three billion, four hundred twenty-one million, one hundred fifty-three thousand, five hundred forty".