31601142 has 24 divisors (see below), whose sum is σ = 72073560. Its totient is φ = 9979200.

The previous prime is 31601137. The next prime is 31601179. The reversal of 31601142 is 24110613.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45859 + ... + 46542.

It is an arithmetic number, because the mean of its divisors is an integer number (3003065).

Almost surely, 2^31601142 is an apocalyptic number.

31601142 is an abundant number, since it is smaller than the sum of its proper divisors (40472418).

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

31601142 is a wasteful number, since it uses less digits than its factorization.

31601142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92428 (or 92425 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 31601142 is about 5621.4893044459. The cubic root of 31601142 is about 316.1556342258.

Adding to 31601142 its reverse (24110613), we get a palindrome (55711755).

The spelling of 31601142 in words is "thirty-one million, six hundred one thousand, one hundred forty-two".