1356661431 has 6 divisors (see below), whose sum is σ = 1959622080. Its totient is φ = 904440948.

The previous prime is 1356661429. The next prime is 1356661433. The reversal of 1356661431 is 1341666531.

It is an interprime number because it is at equal distance from previous prime (1356661429) and next prime (1356661433).

It is not a de Polignac number, because 1356661431 - 2¹ = 1356661429 is a prime.

It is a super-2 number, since 2×1356661431² = 3681060476725935522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356661433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75370071 + ... + 75370088.

It is an arithmetic number, because the mean of its divisors is an integer number (326603680).

Almost surely, 2^1356661431 is an apocalyptic number.

1356661431 is a deficient number, since it is larger than the sum of its proper divisors (602960649).

1356661431 is a wasteful number, since it uses less digits than its factorization.

1356661431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150740165 (or 150740162 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 1356661431 is about 36832.8851843024. The cubic root of 1356661431 is about 1107.0243138193.

The spelling of 1356661431 in words is "one billion, three hundred fifty-six million, six hundred sixty-one thousand, four hundred thirty-one".