1553431 has 4 divisors (see below), whose sum is σ = 1694664. Its totient is φ = 1412200.

The previous prime is 1553429. The next prime is 1553437. The reversal of 1553431 is 1343551.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1553431 - 2¹ = 1553429 is a prime.

It is a super-2 number, since 2×1553431² = 4826295743522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553437) 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, 70600 + ... + 70621.

It is an arithmetic number, because the mean of its divisors is an integer number (423666).

2^1553431 is an apocalyptic number.

1553431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1553431 is a deficient number, since it is larger than the sum of its proper divisors (141233).

1553431 is a wasteful number, since it uses less digits than its factorization.

1553431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141232.

The product of its digits is 900, while the sum is 22.

The square root of 1553431 is about 1246.3671208757. The cubic root of 1553431 is about 115.8147807125.

Adding to 1553431 its reverse (1343551), we get a palindrome (2896982).

The spelling of 1553431 in words is "one million, five hundred fifty-three thousand, four hundred thirty-one".