1351503243 has 6 divisors (see below), whose sum is σ = 1952171364. Its totient is φ = 901002156.

The previous prime is 1351503229. The next prime is 1351503259. The reversal of 1351503243 is 3423051531.

1351503243 is a `hidden beast` number, since 135 + 1 + 503 + 24 + 3 = 666.

It is not a de Polignac number, because 1351503243 - 2⁸ = 1351502987 is a prime.

It is a super-3 number, since 3×1351503243³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1351503143) 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, 75083505 + ... + 75083522.

It is an arithmetic number, because the mean of its divisors is an integer number (325361894).

Almost surely, 2^1351503243 is an apocalyptic number.

1351503243 is a deficient number, since it is larger than the sum of its proper divisors (600668121).

1351503243 is a wasteful number, since it uses less digits than its factorization.

1351503243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150167033 (or 150167030 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1351503243 is about 36762.7969964202. The cubic root of 1351503243 is about 1105.6195192432.

Adding to 1351503243 its reverse (3423051531), we get a palindrome (4774554774).

The spelling of 1351503243 in words is "one billion, three hundred fifty-one million, five hundred three thousand, two hundred forty-three".