155215334040 has 64 divisors (see below), whose sum is σ = 501464930400. Its totient is φ = 38206851072.

The previous prime is 155215334003. The next prime is 155215334117. The reversal of 155215334040 is 40433512551.

It is a super-2 number, since 2×155215334040² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155215333992 and 155215334010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49746945 + ... + 49750064.

Almost surely, 2^155215334040 is an apocalyptic number.

155215334040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155215334040 is an abundant number, since it is smaller than the sum of its proper divisors (346249596360).

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

155215334040 is a wasteful number, since it uses less digits than its factorization.

155215334040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99497036 (or 99497032 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 155215334040 its reverse (40433512551), we get a palindrome (195648846591).

The spelling of 155215334040 in words is "one hundred fifty-five billion, two hundred fifteen million, three hundred thirty-four thousand, forty".