1253055551 has 12 divisors (see below), whose sum is σ = 1379697312. Its totient is φ = 1137180000.

The previous prime is 1253055547. The next prime is 1253055563. The reversal of 1253055551 is 1555503521.

It is not a de Polignac number, because 1253055551 - 2² = 1253055547 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 (1253055541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64106 + ... + 81336.

It is an arithmetic number, because the mean of its divisors is an integer number (114974776).

Almost surely, 2^1253055551 is an apocalyptic number.

1253055551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1253055551 is a deficient number, since it is larger than the sum of its proper divisors (126641761).

1253055551 is a wasteful number, since it uses less digits than its factorization.

1253055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17854 (or 17843 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 1253055551 is about 35398.5247008968. The cubic root of 1253055551 is about 1078.0943621410.

The spelling of 1253055551 in words is "one billion, two hundred fifty-three million, fifty-five thousand, five hundred fifty-one".