154221070542 has 48 divisors (see below), whose sum is σ = 387464520576. Its totient is φ = 40057419600.

The previous prime is 154221070537. The next prime is 154221070547. The reversal of 154221070542 is 245070122451.

It is an interprime number because it is at equal distance from previous prime (154221070537) and next prime (154221070547).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154221070547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15168184 + ... + 15178347.

It is an arithmetic number, because the mean of its divisors is an integer number (8072177512).

Almost surely, 2^154221070542 is an apocalyptic number.

154221070542 is an abundant number, since it is smaller than the sum of its proper divisors (233243450034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154221070542 is a wasteful number, since it uses less digits than its factorization.

154221070542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30346565 (or 30346554 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

Adding to 154221070542 its reverse (245070122451), we get a palindrome (399291192993).

The spelling of 154221070542 in words is "one hundred fifty-four billion, two hundred twenty-one million, seventy thousand, five hundred forty-two".