155015034421 has 8 divisors (see below), whose sum is σ = 168592133304. Its totient is φ = 141674059200.

The previous prime is 155015034409. The next prime is 155015034431. The reversal of 155015034421 is 124430510551.

It can be written as a sum of positive squares in 4 ways, for example, as 34249054225 + 120765980196 = 185065^2 + 347514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155015034421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155015034401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59029546 + ... + 59032171.

It is an arithmetic number, because the mean of its divisors is an integer number (21074016663).

Almost surely, 2^155015034421 is an apocalyptic number.

It is an amenable number.

155015034421 is a deficient number, since it is larger than the sum of its proper divisors (13577098883).

155015034421 is a wasteful number, since it uses less digits than its factorization.

155015034421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118061831.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 155015034421 its reverse (124430510551), we get a palindrome (279445544972).

The spelling of 155015034421 in words is "one hundred fifty-five billion, fifteen million, thirty-four thousand, four hundred twenty-one".