253553452021 has 4 divisors (see below), whose sum is σ = 253564722112. Its totient is φ = 253542181932.

The previous prime is 253553451973. The next prime is 253553452057. The reversal of 253553452021 is 120254355352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253553452021 - 2¹¹ = 253553449973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253553452921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5601231 + ... + 5646316.

It is an arithmetic number, because the mean of its divisors is an integer number (63391180528).

Almost surely, 2^253553452021 is an apocalyptic number.

It is an amenable number.

253553452021 is a deficient number, since it is larger than the sum of its proper divisors (11270091).

253553452021 is a wasteful number, since it uses less digits than its factorization.

253553452021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11270090.

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 253553452021 in words is "two hundred fifty-three billion, five hundred fifty-three million, four hundred fifty-two thousand, twenty-one".