1550540253 has 4 divisors (see below), whose sum is σ = 2067387008. Its totient is φ = 1033693500.

The previous prime is 1550540249. The next prime is 1550540261. The reversal of 1550540253 is 3520450551.

It is a happy number.

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 not a de Polignac number, because 1550540253 - 2² = 1550540249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1550540253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550540753) 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, 258423373 + ... + 258423378.

It is an arithmetic number, because the mean of its divisors is an integer number (516846752).

Almost surely, 2^1550540253 is an apocalyptic number.

It is an amenable number.

1550540253 is a deficient number, since it is larger than the sum of its proper divisors (516846755).

1550540253 is an equidigital number, since it uses as much as digits as its factorization.

1550540253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516846754.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1550540253 is about 39376.8999922543. The cubic root of 1550540253 is about 1157.4289701044.

The spelling of 1550540253 in words is "one billion, five hundred fifty million, five hundred forty thousand, two hundred fifty-three".