31149061 has 4 divisors (see below), whose sum is σ = 32503392. Its totient is φ = 29794732.

The previous prime is 31149059. The next prime is 31149119. The reversal of 31149061 is 16094113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16094113 = 7 ⋅2299159.

It is a cyclic number.

It is not a de Polignac number, because 31149061 - 2¹ = 31149059 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 (31149361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677131 + ... + 677176.

It is an arithmetic number, because the mean of its divisors is an integer number (8125848).

Almost surely, 2^31149061 is an apocalyptic number.

It is an amenable number.

31149061 is a deficient number, since it is larger than the sum of its proper divisors (1354331).

31149061 is a wasteful number, since it uses less digits than its factorization.

31149061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354330.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 31149061 is about 5581.1343829010. The cubic root of 31149061 is about 314.6407628887.

The spelling of 31149061 in words is "thirty-one million, one hundred forty-nine thousand, sixty-one".