1542385631 has 2 divisors, whose sum is σ = 1542385632. Its totient is φ = 1542385630.

The previous prime is 1542385573. The next prime is 1542385661. The reversal of 1542385631 is 1365832451.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1365832451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1542385631 - 2⁶ = 1542385567 is a prime.

It is a super-2 number, since 2×1542385631² = 4757906869430536322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542385661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771192815 + 771192816.

It is an arithmetic number, because the mean of its divisors is an integer number (771192816).

Almost surely, 2^1542385631 is an apocalyptic number.

1542385631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542385631 is an equidigital number, since it uses as much as digits as its factorization.

1542385631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 1542385631 is about 39273.2177316807. The cubic root of 1542385631 is about 1155.3963472990.

The spelling of 1542385631 in words is "one billion, five hundred forty-two million, three hundred eighty-five thousand, six hundred thirty-one".