31540051154 has 4 divisors (see below), whose sum is σ = 47310076734. Its totient is φ = 15770025576.

The previous prime is 31540051139. The next prime is 31540051157. The reversal of 31540051154 is 45115004513.

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., 22313488129 + 9226563025 = 149377^2 + 96055^2 .

It is not an unprimeable number, because it can be changed into a prime (31540051157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7885012787 + ... + 7885012790.

Almost surely, 2^31540051154 is an apocalyptic number.

31540051154 is a deficient number, since it is larger than the sum of its proper divisors (15770025580).

31540051154 is a wasteful number, since it uses less digits than its factorization.

31540051154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15770025579.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 31540051154 its reverse (45115004513), we get a palindrome (76655055667).

The spelling of 31540051154 in words is "thirty-one billion, five hundred forty million, fifty-one thousand, one hundred fifty-four".