31401045 has 36 divisors (see below), whose sum is σ = 58951620. Its totient is φ = 15455232.

The previous prime is 31401043. The next prime is 31401061. The reversal of 31401045 is 54010413.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5574321 + 25826724 = 2361^2 + 5082^2 .

It is not a de Polignac number, because 31401045 - 2¹ = 31401043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401043) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5541 + ... + 9669.

It is an arithmetic number, because the mean of its divisors is an integer number (1637545).

Almost surely, 2^31401045 is an apocalyptic number.

It is an amenable number.

31401045 is a deficient number, since it is larger than the sum of its proper divisors (27550575).

31401045 is a wasteful number, since it uses less digits than its factorization.

31401045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166 (or 4150 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31401045 is about 5603.6635337964. The cubic root of 31401045 is about 315.4869264384.

Adding to 31401045 its reverse (54010413), we get a palindrome (85411458).

The spelling of 31401045 in words is "thirty-one million, four hundred one thousand, forty-five".