1551352423 has 4 divisors (see below), whose sum is σ = 1551549088. Its totient is φ = 1551155760.

The previous prime is 1551352399. The next prime is 1551352433. The reversal of 1551352423 is 3242531551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551352423 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 (1551352433) 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, 85983 + ... + 102448.

It is an arithmetic number, because the mean of its divisors is an integer number (387887272).

Almost surely, 2^1551352423 is an apocalyptic number.

1551352423 is a deficient number, since it is larger than the sum of its proper divisors (196665).

1551352423 is an equidigital number, since it uses as much as digits as its factorization.

1551352423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196664.

The product of its digits is 18000, while the sum is 31.

The square root of 1551352423 is about 39387.2114143665. The cubic root of 1551352423 is about 1157.6310211861.

Adding to 1551352423 its reverse (3242531551), we get a palindrome (4793883974).

The spelling of 1551352423 in words is "one billion, five hundred fifty-one million, three hundred fifty-two thousand, four hundred twenty-three".