31401137 has 8 divisors (see below), whose sum is σ = 32282976. Its totient is φ = 30526272.

The previous prime is 31401133. The next prime is 31401151. The reversal of 31401137 is 73110413.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31401137 - 2² = 31401133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31401133) 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, 8153 + ... + 11369.

It is an arithmetic number, because the mean of its divisors is an integer number (4035372).

Almost surely, 2^31401137 is an apocalyptic number.

It is an amenable number.

31401137 is a deficient number, since it is larger than the sum of its proper divisors (881839).

31401137 is a wasteful number, since it uses less digits than its factorization.

31401137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 31401137 is about 5603.6717427058. The cubic root of 31401137 is about 315.4872345467.

The spelling of 31401137 in words is "thirty-one million, four hundred one thousand, one hundred thirty-seven".