31254105546442 has 4 divisors (see below), whose sum is σ = 46881158319666. Its totient is φ = 15627052773220.

The previous prime is 31254105546437. The next prime is 31254105546463. The reversal of 31254105546442 is 24464550145213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22965458788441 + 8288646758001 = 4792229^2 + 2879001^2 .

It is a super-2 number, since 2×31254105546442² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31254105546392 and 31254105546401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7813526386609 + ... + 7813526386612.

Almost surely, 2^{31254105546442} is an apocalyptic number.

31254105546442 is a deficient number, since it is larger than the sum of its proper divisors (15627052773224).

31254105546442 is a wasteful number, since it uses less digits than its factorization.

31254105546442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15627052773223.

The product of its (nonzero) digits is 2304000, while the sum is 46.

The spelling of 31254105546442 in words is "thirty-one trillion, two hundred fifty-four billion, one hundred five million, five hundred forty-six thousand, four hundred forty-two".