1553242455 has 24 divisors (see below), whose sum is σ = 2695606992. Its totient is φ = 827374464.

The previous prime is 1553242429. The next prime is 1553242469. The reversal of 1553242455 is 5542423551.

1553242455 is a `hidden beast` number, since 155 + 32 + 424 + 55 = 666.

It is not a de Polignac number, because 1553242455 - 2⁶ = 1553242391 is a prime.

It is a congruent number.

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, 16347 + ... + 58083.

It is an arithmetic number, because the mean of its divisors is an integer number (112316958).

Almost surely, 2^1553242455 is an apocalyptic number.

1553242455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1553242455 is a deficient number, since it is larger than the sum of its proper divisors (1142364537).

1553242455 is a wasteful number, since it uses less digits than its factorization.

1553242455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42575 (or 42572 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 1553242455 is about 39411.1970764655. The cubic root of 1553242455 is about 1158.1009491670.

The spelling of 1553242455 in words is "one billion, five hundred fifty-three million, two hundred forty-two thousand, four hundred fifty-five".