143431013402 has 4 divisors (see below), whose sum is σ = 215146520106. Its totient is φ = 71715506700.

The previous prime is 143431013381. The next prime is 143431013431. The reversal of 143431013402 is 204310134341.

It is a happy number.

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., 140925910801 + 2505102601 = 375401^2 + 50051^2 .

It is a super-2 number, since 2×143431013402² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35857753349 + ... + 35857753352.

Almost surely, 2^143431013402 is an apocalyptic number.

143431013402 is a deficient number, since it is larger than the sum of its proper divisors (71715506704).

143431013402 is an equidigital number, since it uses as much as digits as its factorization.

143431013402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71715506703.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 143431013402 its reverse (204310134341), we get a palindrome (347741147743).

The spelling of 143431013402 in words is "one hundred forty-three billion, four hundred thirty-one million, thirteen thousand, four hundred two".