1151423551 has 4 divisors (see below), whose sum is σ = 1154902504. Its totient is φ = 1147944600.

The previous prime is 1151423501. The next prime is 1151423563. The reversal of 1151423551 is 1553241511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1553241511 = 71 ⋅21876641.

It is a cyclic number.

It is not a de Polignac number, because 1151423551 - 2¹³ = 1151415359 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 (1151423501) 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, 1738980 + ... + 1739641.

It is an arithmetic number, because the mean of its divisors is an integer number (288725626).

Almost surely, 2^1151423551 is an apocalyptic number.

1151423551 is a deficient number, since it is larger than the sum of its proper divisors (3478953).

1151423551 is an equidigital number, since it uses as much as digits as its factorization.

1151423551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478952.

The product of its digits is 3000, while the sum is 28.

The square root of 1151423551 is about 33932.6325386051. The cubic root of 1151423551 is about 1048.1216762241.

The spelling of 1151423551 in words is "one billion, one hundred fifty-one million, four hundred twenty-three thousand, five hundred fifty-one".