1356172431 has 16 divisors (see below), whose sum is σ = 1829689344. Its totient is φ = 893449184.

The previous prime is 1356172403. The next prime is 1356172471. The reversal of 1356172431 is 1342716531.

It is a cyclic number.

It is not a de Polignac number, because 1356172431 - 2⁷ = 1356172303 is a prime.

It is a super-2 number, since 2×1356172431² = 3678407325208899522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1356172392 and 1356172401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356172471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78850 + ... + 94496.

It is an arithmetic number, because the mean of its divisors is an integer number (114355584).

Almost surely, 2^1356172431 is an apocalyptic number.

1356172431 is a deficient number, since it is larger than the sum of its proper divisors (473516913).

1356172431 is a wasteful number, since it uses less digits than its factorization.

1356172431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15990.

The product of its digits is 15120, while the sum is 33.

The square root of 1356172431 is about 36826.2464962152. The cubic root of 1356172431 is about 1106.8912912070.

Adding to 1356172431 its reverse (1342716531), we get a palindrome (2698888962).

The spelling of 1356172431 in words is "one billion, three hundred fifty-six million, one hundred seventy-two thousand, four hundred thirty-one".