155315031 has 8 divisors (see below), whose sum is σ = 208717824. Its totient is φ = 102727800.

The previous prime is 155315029. The next prime is 155315033. The reversal of 155315031 is 130513551.

It is an interprime number because it is at equal distance from previous prime (155315029) and next prime (155315033).

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

It is not a de Polignac number, because 155315031 - 2¹ = 155315029 is a prime.

It is a super-2 number, since 2×155315031² = 48245517709061922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155314992 and 155315010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155315033) 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, 203445 + ... + 204206.

It is an arithmetic number, because the mean of its divisors is an integer number (26089728).

Almost surely, 2^155315031 is an apocalyptic number.

155315031 is a deficient number, since it is larger than the sum of its proper divisors (53402793).

155315031 is a wasteful number, since it uses less digits than its factorization.

155315031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407781.

The product of its (nonzero) digits is 1125, while the sum is 24.

The square root of 155315031 is about 12462.5451252944. The cubic root of 155315031 is about 537.5322133930.

Adding to 155315031 its reverse (130513551), we get a palindrome (285828582).

The spelling of 155315031 in words is "one hundred fifty-five million, three hundred fifteen thousand, thirty-one".