31242010154 has 4 divisors (see below), whose sum is σ = 46863015234. Its totient is φ = 15621005076.

The previous prime is 31242010147. The next prime is 31242010159. The reversal of 31242010154 is 45101024213.

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., 28687213129 + 2554797025 = 169373^2 + 50545^2 .

It is not an unprimeable number, because it can be changed into a prime (31242010159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7810502537 + ... + 7810502540.

Almost surely, 2^31242010154 is an apocalyptic number.

31242010154 is a deficient number, since it is larger than the sum of its proper divisors (15621005080).

31242010154 is a wasteful number, since it uses less digits than its factorization.

31242010154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15621005079.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 31242010154 its reverse (45101024213), we get a palindrome (76343034367).

The spelling of 31242010154 in words is "thirty-one billion, two hundred forty-two million, ten thousand, one hundred fifty-four".