40312154 has 4 divisors (see below), whose sum is σ = 60468234. Its totient is φ = 20156076.

The previous prime is 40312141. The next prime is 40312177. The reversal of 40312154 is 45121304.

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., 38130625 + 2181529 = 6175^2 + 1477^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078037 + ... + 10078040.

Almost surely, 2^40312154 is an apocalyptic number.

40312154 is a deficient number, since it is larger than the sum of its proper divisors (20156080).

40312154 is a wasteful number, since it uses less digits than its factorization.

40312154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20156079.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40312154 is about 6349.1853020683. The cubic root of 40312154 is about 342.8825115323.

Adding to 40312154 its reverse (45121304), we get a palindrome (85433458).

The spelling of 40312154 in words is "forty million, three hundred twelve thousand, one hundred fifty-four".