31542143357 has 8 divisors (see below), whose sum is σ = 32421833016. Its totient is φ = 30663885312.

The previous prime is 31542143299. The next prime is 31542143377. The reversal of 31542143357 is 75334124513.

It can be written as a sum of positive squares in 4 ways, for example, as 12692500921 + 18849642436 = 112661^2 + 137294^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31542143357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31542143357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31542143377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313148 + ... + 401429.

It is an arithmetic number, because the mean of its divisors is an integer number (4052729127).

Almost surely, 2^31542143357 is an apocalyptic number.

31542143357 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

31542143357 is a deficient number, since it is larger than the sum of its proper divisors (879689659).

31542143357 is a wasteful number, since it uses less digits than its factorization.

31542143357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715807.

The product of its digits is 151200, while the sum is 38.

The spelling of 31542143357 in words is "thirty-one billion, five hundred forty-two million, one hundred forty-three thousand, three hundred fifty-seven".