1356511431 has 16 divisors (see below), whose sum is σ = 1991214720. Its totient is φ = 814583520.

The previous prime is 1356511393. The next prime is 1356511451. The reversal of 1356511431 is 1341156531.

1356511431 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1356511431 - 2⁹ = 1356510919 is a prime.

It is a super-2 number, since 2×1356511431² = 3680246524867335522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356511451) 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, 184965 + ... + 192158.

It is an arithmetic number, because the mean of its divisors is an integer number (124450920).

Almost surely, 2^1356511431 is an apocalyptic number.

1356511431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1356511431 is a deficient number, since it is larger than the sum of its proper divisors (634703289).

1356511431 is a wasteful number, since it uses less digits than its factorization.

1356511431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377246.

The product of its digits is 5400, while the sum is 30.

The square root of 1356511431 is about 36830.8489041456. The cubic root of 1356511431 is about 1106.9835127362.

Adding to 1356511431 its reverse (1341156531), we get a palindrome (2697667962).

The spelling of 1356511431 in words is "one billion, three hundred fifty-six million, five hundred eleven thousand, four hundred thirty-one".