55431162140 has 12 divisors (see below), whose sum is σ = 116405440536. Its totient is φ = 22172464848.

The previous prime is 55431162133. The next prime is 55431162161. The reversal of 55431162140 is 4126113455.

It is a super-2 number, since 2×55431162140² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55431162097 and 55431162106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385779034 + ... + 1385779073.

It is an arithmetic number, because the mean of its divisors is an integer number (9700453378).

Almost surely, 2^55431162140 is an apocalyptic number.

It is an amenable number.

55431162140 is an abundant number, since it is smaller than the sum of its proper divisors (60974278396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55431162140 is a wasteful number, since it uses less digits than its factorization.

55431162140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771558116 (or 2771558114 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 55431162140 its reverse (4126113455), we get a palindrome (59557275595).

The spelling of 55431162140 in words is "fifty-five billion, four hundred thirty-one million, one hundred sixty-two thousand, one hundred forty".