1542251431 has 6 divisors (see below), whose sum is σ = 1794047640. Its totient is φ = 1321929756.

The previous prime is 1542251419. The next prime is 1542251437. The reversal of 1542251431 is 1341522451.

It is not a de Polignac number, because 1542251431 - 2²¹ = 1540154279 is a prime.

It is a super-2 number, since 2×1542251431² = 4757078952843095522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1542251431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542251437) 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, 15737211 + ... + 15737308.

It is an arithmetic number, because the mean of its divisors is an integer number (299007940).

Almost surely, 2^1542251431 is an apocalyptic number.

1542251431 is a deficient number, since it is larger than the sum of its proper divisors (251796209).

1542251431 is an equidigital number, since it uses as much as digits as its factorization.

1542251431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31474533 (or 31474526 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 1542251431 is about 39271.5091510372. The cubic root of 1542251431 is about 1155.3628367243.

Adding to 1542251431 its reverse (1341522451), we get a palindrome (2883773882).

The spelling of 1542251431 in words is "one billion, five hundred forty-two million, two hundred fifty-one thousand, four hundred thirty-one".